MAJOR SPOILERS ahead!!! Kyoukai and Shin are endgame btw. And as someone that HATES Romance in action, this is pretty good. Also, even then there's hardly any romance in this. He does end up proposing but do not worry, she doesnt become like those damsel in distress FLs. She remains as the same Kyoukai in the beginning. Kyoukai and Shin make a badass team.