The heroine is simple in school, beautiful girl outside school + drag sister
The male protagonist Chun Chun is a big sunny boy
The male and female protagonists are happy enemies in school. The male protagonist meets the female protagonist outside the school and develops feelings for the female protagonist. After that, the male protagonist pursues the female protagonist and falls in love with her for a long time.
Boys are almost a year younger than girls (I don't care if they are one year old or younger, hahaha)
Intention: The writer is happy