Season 1 of Tomorrow premiered on April 1, 2022.

Choi Joonwoong seeks a job, but it's hard for him to get hired. One night, he witnesses a man trying to end his life and decides to stop him. He gets acquainted with grim reapers Goo Ryeon and Im Ryoonggoo, who belong to a crisis management team. Their purpose is to prevent people from committing suicide. After Joonwoong ends up in a coma and becomes half-human and half-spirit, he is employed by a company of grim reapers as the newest member of the crisis management team.