Found his nephew masturbating with his underwear

Koji lives at his aunt's house to attend a university outside the prefecture. I am satisfied with living under the same roof with my thirsty aunt, but at the same time I cannot stand excessive stimulation. I won't lay a hand on my aunt. Only borrow used underwear for a short time … Koji, who could no longer suppress his worldly desires, secretly sneaked into the dressing room and wrapped himself in his aunt's underwear and performed the act of manual masturbation, but was unfortunately discovered by his aunt.