[Gekikara-naporitan-tou] Onanie Gurui no InCha Joshi wa Anal Choukyou de Kairaku Ochi

Hinashu seems like the quiet, serious bookworm who spends her library hours on secret self-love, but when her teacher uncovers just how perverted the recluse really is, his idea of discipline quickly turns into a feverish after-school affair. Between lessons, the well-endowed instructor claims her virginity and fills her up before anyone can walk in, while she teases him about whether class is even over yet. By the time this busty cheerleader strolls in with a toy buried inside her—trained daily for his sake and proudly pushed out for his approval—her transformation into a shameless, anal-devoted student is complete, and her tearfully proud teacher couldn't be happier to witness it.