Desperate to satisfy his urges but with no one around, Shuji spends his days obsessively searching his phone for porn to jerk off to. As his desire builds to the brink of explosion, his sense of reason begins to crumble. Then one day, his mother, Yua, comes into his room to clean. The moment he sees her, Shuji is captivated—gazing at her with lust for the first time. Her body looks like something out of a filthy dream: her wobbling K-cup breasts and her exposed, voluptuous ass. To him, his mother's figure is unbelievably, irresistibly hot.