Episode 1 S01 E01

Jung Il-woo (as Kang Ji-Woon / Han Ji-Woon) Park So-dam (as Eun Ha-Won) Ahn Jae-hyun (as Kang Hyun-Min) Lee Jung-shin (as Kang Seo-Woo) Hye-ri Kim (as Ji Hwa-Ja) Choi Eun-kyeong (as Park Soo-Kyung) Son Na-eun (as Park Hye-Ji) Choi Shang (as Lee Yoon-Sung) Kim Yong-geon (as CEO Kang) Go Bo-gyeol (as Choi Yoo-Na) Park Min soo (as Kang Ji-Woon (child)) Jeon Jin-seo (as Kang Hyun-Min (child)) Lee Na-Yoon (as Eun Ha-Won (child)) Hong Dong-yeong (as Kang Seo-Woo (child)) Jo Yong jin (as Lee Yoon-Sung (child)) Park Ji So (as Park Hye-Ji (child))

love triangle forbidden love romcom romance first love cohabitation reverse harem chaebol swoonworthy based on manhwa