Halcyon Days ~Sunny Days with Sister-chan~

Name: Halcyon Days ~Sunny Days with Sister-chan~
Availability: InStock
Rating: 3.0 (1 reviews)
Author: CatNight

by CatNight

Censored Windows

Versionv1.0.4

EngineRPGM

Released2025-09-14

Updated2026-05-08

LanguageEnglish ( GLM-5 )

You wash up on a quiet beach, barely conscious, only to be found and taken in by a kind-hearted nun known only as Sister-chan. This is a cohabitation touch simulation game that gently unfolds your daily life together under the warmth of spring.

Screenshots

BuzzHeavier DataNodes GoFile Pixeldrain VikingFile

v1.0.4 Fixed issue where relationship with Sister-chan would become extremely negative when going to town 【Bugs and Issues Under Investigation】 Unable to perform insertion during the second forced assault creampie not counted when reaching climax simultaneously Reverts back to calling "older brother" We apologize for the inconvenience. v1.0.3 Fixed ending not triggering Fixed fewer choices appearing when climaxing simultaneously from behind Fixed Sister-chan remaining asleep Fixed remaining asleep when starting touching via "invite to H" v1.0.2 Fixed receptivity being locked at 100 Fixed incorrect messages when walking in town Fixed items being usable multiple times Fixed 20,000-yen items not working correctly Fixed Mamushi Drink not being released Fixed character becoming depressed when inviting to H Fixed insertion gauge not moving Fixed unexpected messages during touch movement Added wait time to touching to prevent crashes from rapid input v1.0.1 Fixed screen darkening and progression halt when selecting "time to go home" on a day off Fixed ending replaying after waking up in the morning Fixed vaginal ejaculation count not increasing beyond one in erotic scenes v1.0 Initial Release

DrWeeb 2026-05-07 ★ ★ ★ ★ ★

I played this a while ago so my memories are a bit fuzzy, but from what I remember, it's average/OK. Nothing special. It's your average co-habitation game. You spend your time working to make money, buy ingredients (your meal plan) and talk to her to raise affection. It goes by pretty fast. Very chill game. The H is OK. If you like the character design, that's all that's going for it, really. There's simple animations IIRC, but nothing great. Story is, you wake up, saved by the sister/nun, and then decide to repay her by working your ass off while living under the same roof. Again, it's a very... Average co-habitation H-game. Simple story, simple gameplay loop. The art is nice, but nothing special.