Heartsworn Abyss: NighTmaRes is a Ren'Py visual novel by sky blue aster, presented with 2D CG artwork. The story follows Rei Tsukiyora, a weary pawnshop owner in Miyogawa’s rough underworld, who shelters Akari Hashimoto after she escapes captors. Their uneasy domestic life draws the attention of Ryuichi Satou, head of the city’s biggest company, whose obsession turns into a plan to ruin Rei and claim Akari. The story presents adult themes of cheating, corruption, and netorare.
Development appears ongoing. The current build is v0.73, dated August 22, 2026, for Windows, Linux, Mac, and Android, in English with no censorship. The latest changelog entry fixes a crash in Chapter 6. Earlier updates expanded voiced content, including fully voiced Chapter 6, added Chapter 7, a main route, some side routes, and a chapter select function. The game also supports an all-ages version by unticking the NighTmaRes DLC.
Developer's description
Rei Tsukiyora is a jaded man who runs a pawnshop in Miyogawa’s seedy underworld. One evening, he comes across a despondent Akari Hashimoto fleeing from her captors. Unable to abandon a young girl to the dangerous streets, Rei begrudgingly takes her in, offering her a reprieve until she finds her bearings.
Spoiler
One thing leads to another, however, and Akari’s stay becomes more… permanent than he had envisioned. For Akari, who has only led a high-flying life, and for Rei, a man living by the skin of his teeth, life together is… manageable (if not amusing).
While Akari may have renounced her past life as an heiress, fate won’t let them go that easily. Akari’s entrancing looks and eminent status catch the eyes of Ryuichi Satou. As the head of Miyogawa’s largest company, he spares no resources on seducing her. An irate Ryuichi even accosts the pair at Rei’s residence, though Akari flatly rejects him.
Humiliated, the scorned prodigy concocts a grand scheme that will lead to the hostile takeover of Akari’s company, and eventually, her heart. He swears to sully every fiber of her innocence. As for Rei… Ryuichi vows to bury him in an everlasting abyss.
Our no-AI promise:
From beginning to end, Heartsworn Abyss is made by humans for humans!
v0.73
fixed a crash in Chapter 6
v0.72
you can now play the all-ages version from start to finish (untick the NighTmaRes DLC)
v0.71
added several hours of voice acting
Chapter 6 is now fully voiced! (Akari, Shiori)
Shiori’s VA is the super cute
Hiiragi Koyomi
(柊木こよみ)!
added voices to a couple lines in previous chapters
fixed typos, errors, etc.
v0.70
Chapter 7 released
main route now available (one H-scene)
some side routes are playable; others will be added at a later date
added “Chapter Select” function
start from any chapter in the game
three presets are provided for Akari
v0.64
Added voice acting for the extended scenario in Chapter 1
v0.63
Added a new scenario in Chapter 5
One new HCG
v0.62
Made it easier to enter the “pure” route
All hidden choices are now revealed by default
You must meet the requirements to select them
v0.61
Fixed bugs, typos, and redundancies
Reduced difficulty of unlocking certain choices
v0.60
Chapter 6 released
Added two new characters, one H-scene
※If the game starts in windowed mode, it might stretch beyond your screen if your display resolution isn’t 4K. Pressing F should fix it! After that, you can specify window size in the options.
v0.56
4K update. Enjoy your favorite redhead in ultra-high-def!
(Shiori+ only)
Two new CGs.
Bzz, bzz!
One new H-scene in Chapter 1. Voice acting will be added after feedback.
Greatly expanded the scenario where Akari & Midori are separated.
New NVL system. Text now perfectly fits inside the message box and will auto-clear once full. Previously this was manually cleared, so it’s a huge improvement in efficiency.
Gallery reworked. Get a sneak preview of Shiori’s sprite!
Fixed several bugs, typos, and redundancies.
v0.41b
N/A
v0.40
Chapter 4 is now live (15k words)! Please enjoy Rei and Akari’s… sweet moments together!
Various under-the-hood optimizations
Fixed various typos (thanks FhulHuse)
v0.36
Akari has hundreds of new voice lines for Chapter 1, expanded to include all bonus scenarios. Every single one of her lines are now voiced.
All stock BGV tracks have been replaced by custom, looping ones voiced by Hibari-san
Various UI fixes
v0.35
This is a major update adding a new, alternate route in Chapter 1. Of course, it comes with a long, “romantic” scene as well!
To access it, play Chapter 1 and allow the “unknown” person to enter when Akari is alone in the restroom.
v0.34
I’ve released an update that restores all of Midori’s missing lines. Thanks so much for bearing with me.
v0.33p
New voice acting for Midori (20 mins of dialog) -Tons of new voice lines for Akari in Chapters 1 & 2 -JP localization (Chapters 1-3 playable in Japanese, languages swappable in-game)
v0.32p
This update adds over 30 minutes of voice acting to Akari in Chapter 3. Routes A and B are now completely voiced for your viewing pleasure. Enjoy!
v0.3p
Chapter 3.
Embark on a harrowing chapter where Akari must use all every tool at her disposal. Will the Crimson Princess manage to escape from her brutal kidnappers unscathed?
v0.2p
This chapter is voiced and contains 4,500 words. Akari may have a few voiceless lines; these will be added in at a future date. (I was working on this chapter when the voice actress was finishing the first batch of recordings.)
Chapter 2 has several under-the-hood improvements such as bug fixes, improved audio quality, and prettier text animations. I had intended to bundle this with Chapter 3, but I’ve decided to release it early while I let Chapter 3 cook. Anyhow, let me know if there are any bugs or the sort in this build
v0.1p
Initial Release
Prologue, Chapter 1.
Estimated length: 24k words
Voiced?
Yes,
but Akari’s missing a few lines near the middle-end!
Sorry, I got a touch of inspiration and wrote a bunch of lines after recording was done! T
hese will be revoiced in v0.2.
No romantic scenes in this one since it’s all about the slow buildup.
However, there are a few spicy scenes if you’re into “that.” Next release will turn the heat up.
Player reviews
Player rating5.0 / 5 · 10 ratings
Written reviews10 · avg 4.8★
Positive (4–5★)90%
Latest review2026-08-01
What players say
Most players rate it highly, praising voice acting, art, and NTR setup, with one critical review.
5★9
4★0
3★1
2★0
1★0
Players like
Voice acting is strong and professional
Character art and renders are attractive
NTR paths feel nuanced and branching
Story and world building are praised
Best for players who like voiced NTR stories with strong art and branching corruption paths.
Summarised from 10 written player reviews.
Osbald1232026-08-01★★★★★
Wonderful game, already hitting above its weight class. Wonderful VA, the corruption element hasn't fully opened up, but the potential is incredible. Dev seems good as well. Our main girl is absolutely beautiful, I don't dislike the secondary girl but…
Arsenik0072026-06-25★★★★★
Honestly the story look pretty good even if everything feel a bit quite unrealistic, not understanding what really happening and how it can happen. Somethings are a bit unsettling to me, like how she dress and makeup exactly like her…
Enlight4322026-01-07★★★★★
I really liked this game One of the specific reasons I want to highlight is the cause behind the cheating scenes These days on F95, I see a lot of cheating and Netorare games where the FMC cheats out of…