Rei is a 17-year old professional shōgi player, who lives by himself, not having a real family, and has scarcely any friends. Among his acquaintances is a family, which consists of a young woman, Akari, and two young girls, Hinata and Momo, and who also keep a numerous number of cats.

A love story between a 24-year-old office worker who has neither love experience nor communication skills and a 32-year-old female shōgi player he meets on his daily commute.