Split-Minded

You play as a voice within the head of a typical VN main character.
Unfortunately, as a voice within Kei (the main character)’s head, you’re not alone, and even worse the other voices are willing to use force to take control of our poor MC.

But maybe, if you can keep control, you can help the main character find love…
…or you can just let the others take control and see what hilarious and/or horrifying antics they get up to while in control.

[From itch.io]