Kang Nam-gilJuno's Father Lim Dong-jinJenny's Father Lee Eung-kyungJuno's Mother Suh Min-jungJenny's Older Sister Ahn Sun-YoungSex Education Teacher Kim Ho-joonDirector / Screenplay Kim Dong-jooExecutive Producer Choi Sun-shikProducer / Music Kim Dong-cheonDirector Of Photography Choi Sae-miCostume Design Lee Min-hwaProduction Supervisor Shin Young-ilLine Producer Yoon Yeo-jinSpecial Effects Supervisor 
