Yosuke harbored an intense desire to have sex with anyone. Broke and without a girlfriend, he kept getting hard no matter how many times he tried to resist. One day, his mother Yuzuri was cleaning in front of him, her massive breasts swaying freely and defenselessly. The sight instantly shattered Yosuke's self-control. Overwhelmed by uncontrollable lust, pushed to the brink of explosion, his berserk mode fully activated in that moment.