I've been wondering for quite some time now if the author puts half the amount of scrutiny we do into the characters' actions or if she simply sees Kase's behavior as cute and romantic.
Honestly I think it's the latter. Kase's feelings have been showing more and more signs of becoming toxic, but the manga still has a light and airy tone. The series doesn't even have a Drama tag.
EDIT: MY guess is we will get to see Yamada's jealous side when Kase's roomate realizes that crush she has been developing on Kase and tries to make a move.
Especially the edit. Rinse and repeat. The story cycles between the girls insecurities. It gets annoying seeing the lack of character development between the two regarding communication. So much could be resolved if they just talked before reacting—but then we wouldn't have a story I guess...
