RPGM - Completed - Stella in Prison [v1.01] [Hinagiku19]

Reading the description, you're automatically reminded of Demon Roots (139 reviews, 4.5 stars). This has nothing to do with that.
Too short, too few decisions, too few different kinks, too little attention to detail. Too much time wasted.
But still two points, because there are worse games.

Short game, 45 minutes at most, with an unremarkable story and combat.

In total, there are 8 H-scenes, of which 4 are unlocked by being defeated in boss fights and feature virginity loss scenes (with blood etc.). The other 4 H-scenes are mostly centered around urination and urethra play. Some assets seem to be ripped from Tunnel Escape (or they both use common assets).

In any case, it's a complete waste of your time. The only plausible reason for downloading this is if you really, really want to see loli H-scenes and/or if you're into urination.