
S01E01 The Return
Hae Sung and Jung Won are ordinary high school seniors who are getting themselves ready for life after graduation. One day, Hae Sung wakes up to find everything surrounding him different. He was dead for...
Moon Sik turns out to be from an affluent family and all his friends feel somewhat betrayed. Ho Bang finds out there's a link between Tae Hoon's mother and the art teacher, Ms. Hyun. Min Joon finds Hae Sung in Jung Won's high school yearbook.
Although born in the same year, two childhood friends end up being 13 years apart because they have aged surprisingly at different places (worlds) for some strange reason. Now Eom Hyeon Soo is a 31-year-old woman but Sung Hae Sung is still a 18-year-old boy. Cha Won Yooung is a chef also interested in Eom Hyeon Soo.