Halcyon Days ~Sunny Days with Sister-chan~
by CatNight
Game Details
- Version
- v1.0.4
- Developer
- CatNight
- Engine
- RPGM
- Status
- Completed
- Language
- English
- Censored
- Yes (Mosaics)
- Updated
- 6 May 2026
About
You wash up half-drowned on a quiet beach and a nun everyone just calls Sister-chan drags you in, feeds you, and lets you stay. What follows is pitched as a gentle cohabitation story, spring light and all, though the tags make clear how "gentle" that gets over time.
The setup is simple: recovery turns into shared living, and shared living turns into something the nun didn't sign up for. There's no grand conflict here, just proximity and time doing their work on her.
Play is point-and-click touching and daily routine management rather than any real puzzle or combat loop. You poke, watch, and nudge her responses along day by day, with the corruption creeping in through small moments rather than big scripted events. Scenes stay in-engine 2D stills, no animation to speak of, and censorship blurs whatever the game itself won't show plainly.
Changelog
- 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.
- 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"
- 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
- 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
- Initial Release
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