Okada, who came to stay at his friend Tetsuya's house, falls head over heels for Mio, the beautiful mother who is no exaggeration to be called a peerless beauty. That night, when Okada went to the kitchen to get a drink of water, he peeked and saw Mio talking on the phone while intensely caressing herself. Okada's groin hardened at the unimaginably lewd sight. He couldn't let such an opportunity slip away. Holding Mio's weakness, Okada threatens to expose her, demanding her to offer her body...