Episode 12 S01 E12

Yook Sung-jae (as Lee Seung-chun) Lee Jong-won (as Hwang Tae-yong) Jung Chae-yeon (as Na Ju-hee) Yeon-woo (as Oh Yeo-jin) Choi Won-young (as Hwang Hyeon-do) Son Yeo-eun (as Seo Young-sin) Choi Dae-chul (as Lee Chul) Han Chae-a (as Jin Sun-hye) Chang Ryul (as Seo Joon -tae) Kim Seo-ha (as Seong Won) Song You-hyun (as Kim Na-young) Son Woo-hyeon (as Jang Moon-ki) Moon Seung-you (as Lee Seung-ah) Kim Kang-min (as Park Jang-goon) Kim Eun-soo (as Lee Dong-kyung) Son Jong-hak (as Na Sang-gook) Jang Hyuk-jin (as Oh Dong-pil) Lee In-hye (as Writer Wang) Lee Min-jae (as Kwon Min-ho) Nam Hyun-joo (as Ms. Gong) Kim Ki-doo (as Ahn Mu-in) Park Joo-Hyung (as Na Geum-seok)

upper class secret identity class differences magical object erased memory lost memory based on webcomic or webtoon chaebol