Shinji quit his job due to homesickness and returned to his hometown. However, he felt awkward about going back to his family home, so he asked his senior, Yuuta, to let him stay at his place. At Yuuta's house, Yuuta's mother, Kazuka, welcomed them warmly and they drank together. But Shinji, who had passed out drunk, was put to sleep on the sofa… When he suddenly woke up, he saw Kazuka, drunk, exposing lewd behavior towards her son Yuuta. Shinji couldn't believe his eyes. Even in the morning, still excited and unable to calm down, he was restless at home when Kazuka appeared…
