A long time ago there was this game that blew up because the title was so ridiculous: Onii-chan, You Are Forbidden from Using Your Right Hand (お兄ちゃん 右手の使用を禁止します) It’s a pure siscon game. The protagonist has a name, but his presence is pathetically low. Several sisters orbit around him, and the OP is an absolute earworm. The game sold because it had a gimmick. That’s it.