Miku, who lost her husband and works at an ear picking beauty salon to raise her son on her own. One day, Miku, who was proposed to by her regular customer Takekawa, was worried about Kazuya, who had her hikikomori, and consulted her hikikomori center. And Miku, who received her advice there and entered Kazuya's room, found her mother-child incest AV in her room. She knew Kazuya's girlfriend's feelings, and Miku made a mistake with her son only once, but it led to her irreversible tragedy.
