15-year old Fujita Momoko is high-school student who often carlessly misses things by mistake. Her best friend Mahiru was her source of moral support. Nowadays, Momoko worries about her classmate Ikarashi-kun who is always late and always goes by his own pace. (Concerns for a fellow!?) One day, Kujou-kun who is always with Ikarashi-kun asks to speak with Momoko. She was asked to take care of Ikarashi-kun, who lives alone, for a week by waking him up and taking him to school...!? (Source: nitoki, translated)