If any game deserves 5 stars, it's this one. The writing, setting, characters, audio FX, etc. are all excellent -- but the real standouts are the art and animation.
All the characters are hand drawn and animated, and they look incredible. So much love and passion and effort are on display in this game. There is so much content, that even just watching through the replay gallery would take you hours.
My only complaint is that this game is an RPGM game, and like all other RPGM games, is full of tons of wasted time. Over the course of the game, you will waste literal hours just walking from place-to-place, opening up the menu to check your journal, grinding money or stats, or even just reloading previous saves because there is no rollback. If someone ever found a way to effectively port this to RenPy and treat it more like a VN, then it would probably be my favorite Adult Game on this site.