Hatsukoi to Marbles: 10 Promises

A romance between two childhood friends. Yuki grew up in the coastal area of Shinagawa and was childhood friends with Takeru, who was a year older than her. Now she is a 4th year student, in love with a childhood friend, but unable to confess to him. Circumstances force her to leave her area. But before leaving, she asks Takeru to fulfill the promise he made 10 years ago and go on 10 dates with her to keep the memories of her first love alive.