Bunji, bullied by his seniors Yoneji and Katsuji from the DQN group. One day, Bunji is seen walking intimately with his mother, Miori, by senior Katsuji, who then threatens to bring his mother home. Feeling guilty, Bunji lies to Miori and takes her to the house where the terrifying seniors are waiting… A few days later… his mother does not return, and the family falls into disarray. Then, when summoned by his seniors to check on his mother's condition, he finds her in a state of lewd chaos…
