ICED Masaki, named Ikeuchi his friend, is a college student who lives alone with his younger sister Mami, who is in elementary school, after his father suddenly left, leaving only a note. Thinking about throwing a college to work and maintain myself and his younger sister, Ikeuchi was encouraged by his best friend of Kanda, which currently has work after care to continue their studies, and if there is a need, Canda. I would be there. Ikeuchi believes that even if unhappiness comes while he has friends and family, they will be happy. Over time, Ikeuchi gets any part-time job that he can get to pay bills. In the end, he forgets about the birthday of mines, but he saves Canda, who not only remembered it, but also bought a gift that I really liked the girl. Ikeuchi notices a strange behavior in Kanda '