This review is a placeholder. It will be reworked.
v0.18b
Art is mostly great. Dialogue and story is weak. Game is buggy. Crashed several times over a playtime of 6-7 hours, which is about how long it took to 'complete'.
A few things;
Almost every interaction starting from the very first scene you might see after the intro, is either incomplete or planned to be reworked, which the game will tell you with big popups and sound effects. There's also a lot of 'not yet implemented' options in the events. The dev could remove the popups and blank choices and instantly make the game seem less 'half done'.
The MC is "18 I swear", but they still look twelve. This is even more strange considering you have a 'younger sister' who is also "18 I promise" but actually at least passes for it. I don't expect this to change though, as changing the MC to look 18 would require a complete overhaul of the art. It's just super weird.
On the topic of the MC; this is likely a bug but after certain scenes the character model gets swapped to what I presume is an earlier version. And it's a lot lower quality than the regular model, especially the 'fully straight leg' goose-stepping walk animation.
Each girl has statistic thresholds you must meet in order to unlock scenes for them. As it is, you have the option of sacrifing most of a day to gain +5 points in a stat, or keep replaying certain scenes to get +1 each time. And given that you might only get a scene that can shift stats once or twice a day per girl, you basically have to throw away your days to make progress or else grind old scenes for ages. Fortunately there's no day tracker, nor timer or somesuch, but it's a painful waste of time to 'spend days' due to the three/four fade to black transitions you have to go through just to sleep to the next day, and repeat. Spend a day should be scrapped, but the stat requirements should also come way down aswell, so that gratuitous scene grinding and stat grinding aren't required.
All in all, a promising groundwork. I'd love to see it expanded/finished. With a playtime of several hours there's an okay amount of content, but the dev is probably trying to stretch the game experience with stat/scene grinding when they could easily shorten grind intervals and maintain the corruption theme. What content there is, is clearly planned to be reworked. And this is from a game that has apparantly been in development since 2018. Updates do not appear to be frequent or substantial, and there's a lot of redoing current work promised.
I wish I could rate it higher because it was enjoyable for the short playtime I had with it. It's just plainly unfinished and reminds you of such at every step. Grindy gameplay and time-wasting design choices hold it back. The past update log does not suggest a lot of new content will come anytime soon, nor an ending. In fact the dev seems intent on just redoing a lot of the work they've already done.
3/5 - play once for the scenes of the hot mom, then come back in five years to see if it ever got finished.