Elenco - My Friend's Older Sister
Park Cho-hyeon
Hee-jin (희진)
Min Joon
Joon-soo (준수)
Joo In-cheol
Jae-seok (재석
Seo Joon-yeol
Hee-gyoo (희규)Lee Kyeong-joon
Head of department (부장)Hong Doo-ri
Stockings girl (스타킹 녀)
Ah Ri
Joon-soo's mom - Special appearance