Episode 4 S01 E04

Rain (as Lee Hae Joon / "Kim Young Soo") Oh Yeon-seo (as Han Hong Nan / "Han Gi Tak") Kim In-kwon (as Kim Young Soo) Kim Soo-ro (as Han Gi Tak) Lee Min-jung (as Shin Da Hye) Lee Ha-nee (as Song Lee Yeon) Choi Won-young (as Cha Jae Gook) Yoon Park (as Manager Jung Ji Hoon) Ra Mi-ran (as Maya) Park In-hwan (as Kim Noh Hwan) Lee Tae-hwan (as Choi Sung Jae) Oh Dae-hwan (as Na Seok Cheol) Kang Ki-young (as Je Gal Gil) Park Cheol-min (as Ma Sang Shik) Ahn Suk-hwan (as President Cha) Oh Na-ra (as Secretary Wang) Lee Moon-sik (as Pilot) Ryu Hwa-young (as Actress Wang Joo Yeon) Lee Re (as Kim Han Na) Park Min-woo (as Actor Yoo Hyuk) Kim Kang-hoon (as Cha Young Chan) Lee Kyu-sub (as Good-for-nothing) Jeong A-mi (as Manager Noh) Kim Bo-jeong (as Park Young Eun) Yoo Min-chae (as Sang Hee) Kim Young-sun (as Gi Tak's mother) Kim Gyeong-ryong (as Chairman Jang) Kim Sun-young (as Department Store Staff) Kwak Dong-yeon (as Han Gi Tak (Young))

based on novel or book reincarnation