Hinaka and Mitsu, who were college classmates and drinking buddies... crossed the line of friendship in a drunken stupor. Just then, a house party was held with everyone gathering, and Mahiro was the first to notice Hinaka's change. Upon learning about the established fact between Hinaka and Mitsu, she seemed displeased. As things stood, a mishap occurred, and the three of them - Hinaka, Mitsu, and Mahiro - ended up spending the night together until morning...
