The Cherry Blossom Festival is one of the first three titles of the original card game line Undo. This mystery begins with the discovery of a dead body in Okayama, Japan in the 2000s. A man in his sixties is found dead in his apartment with a broken wine glass in his hand, a photo of a girl in a wheelchair beside him, and a branch of cherry blossoms on the table. Suddenly, his mobile phone rings...

Undo is a series of card games and time jumps in which you must collaborate to prevent a person's death. Each episode of the series begins with a mysterious crime. Your task is to influence the victim's past in order to avoid the sad initial outcome. You will need to investigate the person's life to understand what caused their death, being careful not to worsen the situation! Will you succeed in your mission?