Episode 1 S01 E01

Krystal Jung (as Yoon Se-na) Rain (as Lee Hyeon-wook) Cha Ye-ryun (as Shin Hae-yun) L (as Shi-woo) Gong Seung-yeon (as Seo Yoon-ji) Jo Hee-bong (as Kang Tae-min) Baek Seung-Heon (as Roy) Kim Jin-woo (as Seo Jae-young) Lee Ho-won (as Kang Rae-hun) Kim Ki-bang (as Yoo Sang-bong) Kim Hye-eun (as Oh Hee-sun) Lee Yoo-jun (as Bool-gom / Brown Bear) Na Hae-ryung (as Yoo Ra-eum) Lee Xia (as Yoon So-eun) Park Young-kyu (as CEO Lee Jong-ho) Alex Chu (as Bae Sung-jin)