Obsazení a štáb Happiness
Park Hyung-sikJung Yi-hyun Joo Jong-hyukKim Seung Beom Lee Jun-hyeokKim Jeong-guk Park Hyoung-sooKook Hae-seong Jung Woon-sunShin So-yoon Cha Soon-baeSun Woo-chang Park Hee-vonNa Hyun-kyung Kang Han-saemKim Dong-hyun Lee Kyoo-hyungLee Seung Yeong [Special ops unit] Jung Jae-eun[I Hyeon's mother] Jeon Seok-chanPark Yong Cheol [Seo Yoon's father, #502] Jay J YangVýkonný producent Kim Tae-seongHudební skladatel 
