Son Dongwoon as Dongwoon

Oh Hayoung as Hayoung

Son Naeun as Naeun (Dongwoon Little Sister)

Oh Seunghee as Seunghee (Hayoung Older Sister)

Jung Yerin  as Yerin (Hayoung Bestfriend)

Park Sooyoung as Joy (Hayoung Bestfriend)