Taiyo Kiriyama tries to smuggle an abandoned cat into his apartment but is caught by the building manager, Asahi Taira. Taiyo knows very well that pets are not allowed in the building, so he begs Asahi to let him keep the cat until he finds it a new home. Asahi agrees and gives Taiyo a month to find the cat a new home. However, there is one additional condition—Taiyo must act as his errand boy during that time. The first days are tough, but Taiyo eventually notices Asahi's hidden charm and infectious smile. He soon discovers that Asahi is in love with someone and wonders if there is a way he can help Asahi be happy with the person he loves.