Shim Hyunseong(17 y.o) : he's the twin's older brother. He have a crush toward Minwoo.

Shim Youngmin(16 y.o) : the older twins. He also have a crush towards Minwoo.

Shim Kwangmin(16 y.o) : the younger twins.

Jeongmin : Hyunseong's guardian.

No Minwoo : the boy who Hyunseong's like. He's the twin's friend.

Sorry that i change the twins name become Shim also because they're Hyunseong's brothers on this story.