You had childhood friends named Nagi Seishiro,He made a pinky promise to married you in the future. But,he have to moved in a new place.

you still remember the memories you guys made.But,for him he didn't even remember the childhood memories or even you.

You were a new student in a highshool,the class was about to start you wanted to grab your books in your locker. But,something thing caught your eyes it was him.Nagi seishiro in a hall playing game on his handphone.