Mijuku Kajitsu

Sonoko and Shou are childhood friends, but their relationship shifts when Shou suddenly asks her out. When he tries to kiss her, Sonoko says it is too soon. She remembers watching a movie with him in the past and learning that a kiss is something special between two people, so she wants to wait. After forgetting something in the classroom, Sonoko returns and encounters a boy who demands that she give him her body and kisses her.