[Sasanoha Toro] Class 1 Shiri ga Dekai Megane no Osanajimi ni Nakadashi Shiro to Honnou ga Itte iru [Fantasy Primer]

When a flustered young boy finally blurts out that he wants to touch his bespectacled childhood friend's enormous butt, Rina's shy reply—if it's you, Kazu-kun, I wouldn't mind—sends them both tumbling into something far more heated than either expected. What begins as trembling, apologetic fumbling against her bare rear on her bed builds as she pants through her uniform, reassuring him she didn't mind at all. The real payoff comes afterward, when Rina calls to breathlessly promise he can finish inside her any time except during her period—and backs it up with a photo proving just how eagerly she wants him to sneak over again.