I like to think that bandana sensei going along with junpei's idiocy is kinda foreshadowed when he was talking to chizuru about kotobuki's body not being suited for the role of a prince and then sensei pointing out that the student's wish is above anything else
lol yeah i mean the Hight difference alone makes it confusing then you remember that they're middle schoolers and not high schoolers like most mangas and anime