All of Exo

Exo as Ae Cha's only friends

Who's clostest to Who

Luhan and Sehun

Kai and D.O

Suho and Lay

Tao and Kris

Baekhyun and Chanyeol

Xuimin and Chen

2PM (some members)

Taecyeon as older brother of Ji Ea

Wooyoung as older brother of Ji Ea

Nickhun as older brother of Ji Ea

SNSD (some members)

Tiffany as older sister of Ji Ea

Yoona as older sister of Ji Ea

Sooyoung as older sister Ji Ea

 B1A4

CNU as old classmate

Jinyoung as bestfriend

Sandeul as old class mate

Gongchan as bestfriend

Baro as old classmate

Infinite as close kpop band to Ji Ea