On a small street corner in Tokyo, an elderly unmarried man lives alone. He is seriously addicted to sex and is very eager to have sex, but he does not have a lover to "help" with his sexuality. A beautiful girl from the countryside came to the city to visit and stay at her brother's house for a few days. She did not expect that this would be a trip that would ruin her daughter's life. Having not seen each other for a long time, the boy did not expect his younger brother to be so grown up now. Electricity and water are complete, and the younger sister's pretty face looks "upright" at the first meeting.