Do you know everything about yourself? This game helps you discover your true self while acting as a barrier for someone's sanity. Will you let her run wild and take control over everything, will you imprison her, or will you be able to keep the balance between the bad and the worse?
Gameplay wise, there's not a lot. It's definitely a grindy idle game but the goals/achievements can speed up the progression, or watching ads if you're impatient but I recommend going at the regular pace instead of trying to "speedrun" it. Check back once in a while and progress the story, good things are better if you don't rush them.
Story wise? I don't think I'll ever be able to find another game with a story like this. They know how to keep you interested and they definitely know a lot about you too. This game is also the one that made me start reading books, I can't believe I've been missing out on a lot of good things just because I thought "I won't like books since they don't have pictures" considering I'm a webtoon reader. It's truly a wild experience, I think everyone should play this game at least once and finish all endings.