While doing medical volunteer work abroad, a doctor gets mystical pills enabling him to travel back in time to visit his younger self and a lost love. Ahn Se-ha, Jeong In-gi, Kim Yun-seok, Byun Yo-han, Park Hye-su, Kim Sang-ho, Kim Sung-ryoung, Chae Seo-jin, Se-ha Ahn, Yo-han Byun, Seo-jin Chae, Sang-ho Kim Added on Netflix 2023-09-04. Youtube Trailer