Kim Jongin.

A well-known student. 

A polite and shy guy but still appear charismatic

Did excellent in studies

A dancer.

Famous in school because of his charismatic appearance and his ability to dance all his heart out but because of his shyness, most of the girls aren't really into him accept one guy.

Do Kyungsoo

A not very wll-known student

A very polite and very shy student. But once you know him, he's a total different guy. Funny and goofy all time.

Teacher's favourite. Did excellent in studies.

A normal guy

Not really famous in the school but known as the most goofy guy among his friends.

Fell hard for someone