So the ex doesn't turn out to be an ex at all, nor is she a bad person. Great choice there, but I have to question how "perfect" Kase is portrayed to be. Every bad thing about her turns out to be not true; she has never been in a relationship, she is athletic and good looking, She is consistently cheerful or at least agreeable, and she is utterly and selflessly devoted to Yamada. It's an enjoyable story, but it feels as though it was written out of wish fulfillment.