Mio-kun no Houkago

Mio is a quiet high school student who keeps to himself, avoiding attention from his classmates. But once the final bell rings and everyone else has gone home, he gives in to his hidden desires in the empty classroom. His secret after-school activities are his only release, a private world he never expected anyone to discover. One afternoon, his classmate Aya accidentally walks in on him, catching him in the act. Instead of running away or reporting him, she surprises him by wanting to participate. What begins as an awkward and tense encounter slowly transforms into a regular, unspoken arrangement between the two. Day after day, they meet in the same room after class, exploring their mutual curiosity and physical urges without judgment or attachment. Their relationship remains a secret shared only between them, hidden behind the closed door of the classroom as the rest of the school carries on unaware.