[Arekusa Thunder (Arekusa Mahone)] Yarasetekureru Senpai [BSN]

Between the quiet studies of the classroom, a secret tension simmers between a studious boy and a reserved schoolgirl. While others assume they are simply classmates, a hidden intimacy develops behind closed doors, fueled by a promise to keep their private moments a secret from their peers. As the boundaries of their academic lives blur, the quiet atmosphere of the school transforms into a space for unexpected, intimate encounters that only they know about.