Kouta Fujioka is a 29-year old man who has a good family, including his father who always supports him, his mother who enjoys cooking, and his older sister with her bright personality. He also has a girlfriend named Etsuko Tanebe. Kouta wants people to eat delicious foods made by him and begins a job as an apprentice chef at a restaurant. One day, Kouta suddenly passes out and is sent to the hospital, where he is diagnosed with malignant lymphoma, completely changing his life. Given three months left to live, Kouta makes up his mind, with the support of his family and those he meets at the hospital, to accept his fate and "face a proper death".

片田舎の温かい家庭で生まれ育ち、何事にも中途半端に生きてきた普通の青年・富士岡耕太。そんな彼を、ある日突然悪性リンパ腫が襲った。辛い治療の日々に翻弄される中、様々な人との出会いにより、耕太の中で何かが変わっていった。 寛解、そして、再発。余命宣告を受けた耕太は自らの命の期限と向き合い、「ちゃんと生きて、ちゃんと死ぬ」ことを決意する。

악성 림프종이 발견되어 괴로운 투병생활을 한 후 완치되었다고 생각하지만 1년 후 재발, 3개월의 시한부 인생을 선고 받은 29세 청년의 이야기