Lee Jinki (19 y.o)
- an orphan, adopted by Minho's family
- one of a favorite son due to his outstanding intelligence
- cheerful, responsible and capable guy
 

Choi Minho (18 y.o)
- the mischievous only son of a famous soccer coach
- basketball club captain
- popular boy, ignorant, cheeky, and very loyal when it comes to love

Kim Hyeri (18 y.o)
- Born into a musical family
- has good sense of music
- moody, friendly, innocent, smart
- Minho & Onew's neighbor

Go Aecha (18 y.o)
- the basketball club manager
- daughter of a cold-hearted basketball coach
- a strong-willled girl, friendly but sometimes can be the rebellious one
- Minho's crush. Myungsoo's girlfriend

Kim Myungsoo (18 y.o)
- cold-hearted team's starter
- chic, the romantic guy, more on swooning girls' hearts with his dead-shot
- Minho's teammate
- Aecha's boyfriend