Summer in Heat

by Miconisomi

Uncensored Windows
Versionv1.02
EngineUnity
Released2025-07-28
Updated2026-04-09
LanguageEnglish (MTL), Japanese

Residential areas, farmland, and mountains in the distance. Although it is hardly a remote area It can never be called a city. It is a country town that can be found anywhere. Spoiler The protagonist returns there at the height of summer and takes a job as a live-in temporary worker at his former alma mater. He takes a job as a live-in janitor during the summer vacation. There, he meets his niece, Takanashi Takanashi, who has moved there after her parents’ divorce. Otsuwa (Takanashi Otsuwa), who moved there after her parents divorced, Rino Akatsuki, her older childhood friend. Rino Akatsuki, her older childhood friend. Otoha is a transfer student taking remedial classes, Rino had to attend school during the summer break for club activities. They used to play together as babysitters in the past. The relationship between the three reunited girls was not the same as it had been back then, but had changed slightly. Was it simply because they had grown up, or…? A chance encounter with Otowa and Rino, The protagonist begins to develop a special relationship with Otowa and Rino. Formerly known as "Summer Sacrifice" ​

v1.02 ・Partial motion fixes ・Partial fixes to the look-at function during H scenes ・Implemented panty play (details available on the blog and Ci-en article) ・Adjusted dripping semen effects ・Fixed tail and pigtail behavior ・Fixed settings that reset upon each restart ・Added search functionality (name, ID) to Custom Load (online) ・Debug mode entry method fixed to also allow entry via ‘Right-click held + rapid left-clicks’ ・Fixed some UI behavior ・Added ‘Always set all characters to dangerous days’ option to debug mode v1.01 ・Significantly improved the local (offline) management system for custom characters ・Fixed transparency settings for the ADV message window ・Added auxiliary functionality to address ADV message text display issues ・Disabled joystick/controller input ・Fixed display for some models ・Fixed some default color palettes ・Fixed some animations ・Fixed some shaders ・Adjusted some audio v1.00 - Full version released v0.14 - Fixed some custom functions v0.13 - Moved custom data posting destination to reduce server load v0.12 - Fixed behavior of cross-section animation - Fixed facial expression bug when loading custom characters ・Some UI fixes v0.11 ・Fixed a crash bug on Radeon series graphics boards ・Some UI fixes v0.10 ・Custom+H trial version released v0.04 ・Added UI to display height and three-size information ・Added a function to take a sub-image to character custom images ・Some UI display fixes ・Some model display and color reflection fixes ・Fixed an area where side hair accessories could not be moved or rotated ・Fixed an issue where the resolution was fixed when starting in full screen under certain conditions v0.03 ・Added a function to view and load submitted custom characters ・Fixed a custom loading bug when using certain OS languages ・Some model fixes ・Some UI fixes ・Fixed unintended behavior when connecting a controller ・Fixed other issues with displaying combinations of clothes, etc. v0.02 ・Added a function to post character customizations ・Added a function to remove the frame rate limit ・Some model fixes ・Some UI text corrections ・Some shortcut key layout changes ・Fixed behavior of side hair tails ・Fixed areas where color changes were not retained ・Fixed clothing and underwear combination issues v0.01 ・Custom trial version released
aiye2603 2026-03-07
It sure is a game with an unique level of quality. This game has even more customizations, story and scene variations than the others Miconisomi's games. I would give it a 10/10 and you all should try it, unless you like vanilla stuff.
Red-pinky 2026-02-13
"One of the best 3D games out there! Great story, beautiful environments, and extensive character customization. The game runs smoothly and features a perfect UI/UX . There's still so much room for development—highly recommended!"
Breeze3005 2026-01-31
One of the best animation games ever. Needs a lot of add-ons and customization though. And gangbangs and other positions. I think that is only fair for a game that has reached quite an audience. I hope the developers can improve and make this a better game than ever.
Pradaman 2026-01-28
I really like the smooth and realistic animations during the H scenes and the freedom and range of customizations for the characters during convos and their H scenes. This is genuinely one of the freest and most versatile sim games I've ever played when it comes to freedom and range.
MaidenlessHeathen 2025-12-08
You play as a piece of shit (it is a Miconisomi game, so duh ) who terrorizes nearly every woman in your niece's life. I don't really care beyond that, because the story is padding to get to the next scene of you fucking someone & the rest of the game is just a scene viewer with some VN elements (again, Miconisomi game, duh). That & I instantly focused on the OL & gyaru once I saw them. The animations... By god the animations. They are top class. The new ones are great & the old ones are gold. The details of pubes getting in their mouth after fellatio, cum getting EVERYWHERE , and the likes is grade A. The voice acting is great too, can be a turn off if you don't like that style of VA, but you can still see the effort. Only real issues I have are the lack of translated lines, which is a skill issue on my part, customization being kinda meh, and the MC still looking as fugly as ever (I know, I know, I can change it to a silhouette, & "why am I looking at the dude? ") If you miss the true denegeracy in these kinda games (I know those complaining about Illusion's later games do) You owe yourself a play of this. It's less than 10 gigs, reasonably priced if you do go and buy it, and the quality is stellar for a team of around 8 including the VAs.
JJAkemann 2025-11-16
Decent simulator with great character customisation. Linear story, but too many options for camera controls - good for those that enjoy that feature. Straightforward experience that is at a perfect length
hieunguyen2410 2025-10-21
An excellent simulator that will bring pleasure for a sufficient amount of time that you can spend on it Good character customization but lack of some features and not the most realistic behavior. But overall quality outweighs all possible flaws.
Samenbank 2025-09-26
Damn good! Just scratched the surface, but it instantly outplayed titles like honey-select 2 in my opinion. At least gameplay-wise. *gameplay means h-scenes - i'm not here for the story ^^ Everything runs smooth right from the beginning, no need for 1000 mods to get some really enjoyable scenes. No visible clipping, no problems with lighting and shaders etc. The character-creator is not nearly as powerful as in HS2 or Playhome, but you get good results and most important: it works. And it looks good. And it's fun. That are some points you can't say unreserved about the competitors in this genre. UI is not really beautiful, but very usable as i can say so far. You have plenty of options, and shortcuts for mostly everything. Some flaws are present, like there is only 1 vagina-style that doesn't look good at all, pretty ugly tbh. Pubic-Hair is not great. Also i would prefer to have no anime-style girls but real ones instead. But on the upside you have different variants for every scene (and the scenes are good!), you can finish differently, the controls are mostly intuitive and the camera-movement is flexible and offers many options. And the animations are outstanding! Very fluid and natural! If you are looking for a enjoyable 3D-sex-simulator without the need to mod and adjust everything hours over hours, you should really try this out!
yodyna 2025-08-14
It's very good, but it aint better than koikatsu/illusion games. I want to state that since many people said it is in reviews and it was first reason i tried this game out. - quality is different or slightly better than illusion games, a bit hard to say - UI is ugly and janky, but there is A LOT options to customize - game is very linear, its koikatsu game put into short scenes with free mode between them, i personaly prefer a lot more free roam in koikatsu where you can explore and interact with girls than this - nicely voiced, decent story - male characters unless you change them into ghost models look like zombies which is a bit funny but doesnt fit at all - no bangers or any cool ost songs - a bit boring, didnt hit me but its definitely not a bad game and a cool alternative
ezpz9841 2025-08-06
i'll be doing +points based on the key aspects i like about the game INSANELY good. great character customization +10, great animations and a PLETHORA of them +100, x-ray view is very good +30 along with the option to endlessly creampie +100, camera controls aren't overbearing +10, unique subcamera +10 and fine tuned UI window tuning +10. auto camera rotations and theres random camera along with three preset camera position loadings +10. you can literally hide the entire map or obstructions +50. you can set the transparency of the UI +10. first person camera toggles +20, focus camera to look at specific parts of the body +50 (i never knew i needed something like this). dont ask me to give points on the story or plot or whatever, im never here for that in any game, just here for the porn. a generous 8 gigs, comparing it to other games and with the content this game gives, it's very well deserved +10. very diverse amount of clothing toggles, a LOT of detail and effort was definitely put into that as well and it shows +20. looking through the game's models with the pre-installed bepinex plugins (courtesy to the patcher, +100 to them individually), you can see that theres a great amount of detail that went into the female genitals +10. few things i have issues with which is the zero male customization -10. the main character's body is still nice to look at nonetheless. it didnt stop me from gooning to this a bunch. not a big fan of the hold spacebar to cum button -5. auto climax kinda makes up for it tho +3. you cant toggle the female -10 (this is my unique nitpick) (context: if you can't tell already, i'm into dudes. STILL gooned to this despite that fact). miconisomi really knows what they're doing with their animations (not to mention the fact that theres a shit ton of animations in here in general, especially the fact that whatever pose you can think of, this game probably has it). wish there was more group stuff. if we took the gangbang game from mico and combined it with this, it would be 100% (along with a preferable customization of the men). hope we can see less of ugly bastards altho prolly unlikely. NOTE: if anyone knows any game that can match this game in all of its glory (especially with all the features i said i liked about it), do recommend me, there hasnt been any 3d game i know with such effort put into the gooning aspects.
Gerdt1 2025-06-29
Great game. I'm not lying. You should try it. There have been so few decent H-games lately that this game feels like a ray of sunshine. I know there are "giants" like Illusion, but their company is already exhausted, and they are not making the games we need anymore. You know, I love Honey Select and Playhome and I think they are great games. They are bold and very functional, you can see that they tried to take the quantity of content first and foremost. And then Miconisomi comes along with projects like After Service Gangbang Addicts, Insult Order and Summer Sacrifice, and proves to us that it's not about quantity, but about quality of content. Let's move away from the long introduction and get to the point. ------------------------------------------------------------------------------------------ Summer Sacrifice is basically two things, namely: the editor and awesome sex scenes. Yes, it has a plot, but believe me, even though it is essentially a visual novel, it is here for show. Therefore, it is not worth considering. The editor in this game is very decent, of course, it cannot be compared with Honey Select, but it is much better than in Insult Order. You can make a large number of different characters, change their height, build, clothes, etc. If only you could add a little more clothes and accessories, this editor would be incomparable. Now the most important thing - sex scenes. They are amazing. The animations, transitions and types of poses are very smooth and detailed, and what can we say about the voice acting, they did a 100% job there. There are not as many of them as we would like, but again, quality takes precedence over quantity. ------------------------------------------------------------------------------------------ I hope that the developer will add more content, the promised group sex, even more perversions (they are Japanese after all), and this game will become even better. This game definitely deserves 5 stars, and those who write that it has little content, please be patient, I think the developers will still be able to please us.
Roroboshi 2025-06-10
An excellent simulator that will bring pleasure for a sufficient amount of time that you can spend on it Good character customization but lack of some features and not the most realistic behavior. But overall quality outweighs all possible flaws.
Friurier 2025-04-29
This is so good. I played a lot of sim H-games but this is definitely one of the best. Illusion games suck compared to this. Also, yeah apart from sex there is nothing to do but wtf are you doing here if you wanna play games with actual "Gameplay", go to steam then.
Anon2298 2025-02-02
Probably one of the better looking games in the last era, this is by miles more prettier than any Illusion game... however, I don't it qualifies as a game by much. This game has little to none player agency, the scenes are lineal and railroaded, this works better as a 3D animation than a game, hell, this might be the first 3D Kinetic Novel, is just watching scenes happening without gameplay, deeply disappointed about this tittle, I hope one day these guys return to making actual games with gameplay, also, add some agency. Having one of the best graphics and animations in the market wasted like this feels criminal.
k_nnechaeff 2025-02-01
I am a fan of the studio and bought it immediately after the release and I do not regret at all. It is more than a solid product and I still think miconisomi did a great job by all means. It is quite a great sex simulation sandbox with a simple linear VN as a bonus. There's also a lot of voiced content, including teasing and dialogues during sex-scenes, which, while not super important to me, provides a fun dimension. MC is rude bastard, so those are mostly humiliating stuff. Miconisomi stories are always about coercion with some degree of dub-con always involved. I am not a huge of that stuff, but their scenes are always super hot, if not hottest, and this one also have some sort of sexual awakening story, which is SORT OF sweet. I also find that their character editor being very simple to use and resulting in a much nicer looking characters (to my taste) compared to an Illusion/Illgames one. Although compared to the later it is has way less clothing items and lacks extensibility, at least as far as I know. BUT the best thing I loved about their previous titles, namely Insult Order and After Service Gangbang Addicts, are amazing and crazy sex scenes, with enough variation and control, amazing threesomes, group sex and gangbangs. I think even if the amount of scenes was less than say again in Ill* or KISS games, they were all better executed and simply more fun to look at. This title has great regular scenes, couple of funny NTR moments (the best one was in demo: having sex with the girl while she is leaning outside the window frame talking with her boyfriend), but otherwise it feel much more vanilla in the way its scenes are designed. Basically you get only regular 1-to-1 sex and foreplay "toolset". Everything is there, orals, anal, etc, but nothing too wild or too crazy. Don't get me wrong: those are very polished and enjoyable scenes with A LOT of variation. Also, again for me, some minor details are very hot, like an option to enable stray pubic hairs appear during oral sex or cumplay options after ejaculation. I would really hope that based on the engine they've built they would create more content either as updates or even DLCs for the base game, otherwise it feels like a lot of unrealized potential.
sempiternalcopy 2025-01-31
One of the best hentai games out there, if not the best. Graphics Style fits the game looks really good for an anime style game. Great Story mode and some of the best animations there is for hentai games. Cant get enough.
Gentleman7531 2022-07-16
I love it. cant wait till the full version is out! If you like the other Games of Miconisoni, you will like it too. Right now, there is just a charakter customizer and a nice erotic benchmark. But its a early version of the game, so we have to be patient.
DaveDev 2022-03-06
Seems very promising so far even though with the content we have available, which is character creation and a performance benchmark that contains a sample of what to expect in the near future, hopefully they iron out the few noticeable issues with the game such as the color pallet not change until you switch the item you are trying to change (such as hair or clothing). Looking forward to this games full release it seems like it has potential depending on how much work they put in to be on par if not better than illusion games like koikatsu ect, the one thing I've noticed almost straight away running the benchmark is that collisions are actually accurate to how they should be, if an object pushes something there should be a response which there is.

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