Shuko, aware of her love for Serizawa-kun, decided that she wants to do her best in love. She gets up the courage to invite Serizawa to the sea during the summer vacation. During the double date with Kazune-chan and Kazuki-sempai, an unexpected word came out of her mouth!? On top of that, She runs into Sakaki-kun, who's the source of Shuko's trauma. Summer vacation and a school festival. The excitement is speeding up with the appearance of a new boy, too! This is volume 3 of an unexpected first love first experience story between a super strong girl and a super popular boy!