Sakaki Shinichi (Kaku Kento), a young day trader who lives alone in a high-rise apartment building, is hearing impaired and wears a hearing aid. One day, Sakaki meets a group of former volunteer members from his student days including childhood friend Yamaguchi Sumino (Renbutsu Misako) who also used to be his ex-girlfriend. Although they are envious of the luxurious life that Sakaki now leads, he is actually facing a life crisis like no other. Sakaki has been diagnosed with illness and his days are numbered.