Suki Dakara Kiss Shita no?

Suki Dakara Kiss Shita no? manga summary: It happened in a sunny day right before summer. Fujisawa Souta's first kiss was with his older classmate, Ayase Chihiro. It's now their summer vacation, and yet, nothing has happened between the two of them! What's worse? he discovers that he wasn't actually Ayase's first kiss, and now regrets kissing him.