it was cute but a little boring though.

Agreed. And I don't understand what Kouhei got confused about...? Because he WASN'T confused. Outa IS in a non-consensual relationship. He has no home so he believes in order to stay where he is he needs to use his chi to purify Tatsuki. Who, from what I remember, is in the human world because he needs to learn about it, so it's NOT Outa's fault that he needs purification. So the summary of the book was oh so wrong, yet again.