April spring and the last cherry blossoms bloom. The normally aloof bookworm finds a book in a hospital waiting area. "Living with Dying" is handwritten on the cover. The diary is kept by his popular and joyful classmate Sakura Yamauchi, who explains to him that she has pancreatic cancer and has only a limited time remaining. Now she has one more person to confide in. Sakura is resolved to live her life to the fullest until she dies. His heart slowly changes as her wild attitude and unpredictable deeds jar him.