Jooubachi no Oubou Menou Hen. It was a terrible experience. I don't even remember how I got into this otome, but I regretted that decision after the very first route. The MC is extremely naive and can't stand up for herself, but I could have put up with that somehow, but the LIs... they're awful. I have nothing against 18+ scenes in games, but only if they are well written and the characters have normal relationships. Here, it's the opposite: the LIs tormented the poor MC as much as they could. Maybe for some people, this otome isn't so bad, and that's fine. But I couldn't get through this.
Also - Re:Birthday Song ~Koi o Utau Shinigami~. It seems like a good plot, nice art, and a star-studded seiyuu, but I didn't like the game in a certain way because of the MC, Cocoro. She is too naive and trusting, and she has no personality at all.