With his parents now going on a honeymoon, Yota is sent to stay with his classmate, Osikawa. Far from feeling lonely, Yota is spoiled by Osikawa's beautiful, busty mother, Yuuri. When they take a bath together, he rubs her breasts and sucks her nipples! At night, he touches Yuuri's body as she sleeps next to him and even has sex with her! And so the days of carnal desire at the Osikawa household unfold!