Its more friendship here than reverse harem. Its probably because the male protagonist not developing enough intimate feelings towards her(except for the fiancee?)
Geeez Geordo, Hypocrite much? in this spin off he was already spending loads of time with Maria already, disregarding societal norms, but now he has the gall to try and chastise Katarina for hanging out with her teacher?
Wouldn't mind if Katarina became closer to her teacher and he was the ML. Gerardo being jealous is funny though and I like how he suggested eating in the student council room and she flat out rejected him instead. It's nice she doesn't just following along with his wishes and she puts some thought into things.
Yea I do agree that its hypocritical of Geordo telling Bakarina not to spend time with the teacher while he was the first to neglect her to spend time with Maria.