If You Were Me 4

Includes shorts: Girl on the Run, The Theory & Practice of Teenage Dream, Relay, U and Me and Blue Birds on the Desk.

• Jeon Gye-sooDirector
• Lee Hyun-seungDirector
• Yoon Seong-hoDirector
• Kim Tae-yongDirector
• Pang Eun-jinDirector
• Yoon Seong-hoWriter

• Nam Ji-hyunPark Jin-ju (Blue Bird on the Desk)
• Jung Jin-anMa Jin-ju (Blue Bird on the Desk)
• Kwon Eun-sooSo Young (U and Me)
• Oh Ji-hyeChul Goo's Mother (U and Me)
• Park Bo-youngHee So (Relay)
• Son Eun-seoGyu Ri (Relay)
• Sung Ji-ruTeacher (Blue Birds on the Desk)
• Moon Sung-keunVice Principal (Relay)
• Jung Yu-miHealth Teacher (Relay)
• Kim Mi-hui(Relay)
• Choi Won-taeChoi Young-chan (Girl on the Run)
• Choi Yo-hanCast