High school student Hikari Tsutsui is unpopular with classmates for his otaku behavior. One day, as he was sentenced for pool cleaning duty for being late,
and is paired with the beautiful but reputed troublemaker Iroha Igarashi. When Iroha asks if he would like to be in a relationship with her,
Hikari agrees. However, there is a catch: Iroha is moving in six months, owing to her father’s work; and transferring to another school as a result.