The great teacher's famous saying "I hate gentle girls" appears in the fifth episode of the first season.

According to Douban search, in the anime "My Youth Love Story Really Has a Problem", the teacher said this famous saying: He hates gentle girls. A gentle girl is gentle to everyone, but she will mistakenly think that she is gentle only to me, so she becomes complacent and gets carried away, causing a bad fight and causing harm to both parties. --I hate gentle girls. This sentence expresses the teacher's conflicting emotions and thoughts about the gentle girl, and reflects his understanding and experience of feelings.