The younger brother, who lives in his older brother's apartment, has no income and spends his days feeling ashamed. Today, as usual, his nagging older brother scolded him severely about his work and future, and the younger brother was depressed. His only pleasure is to stare at the swelling of his sister-in-law Mio's body, who is gentle and swaying under the same roof... One day, he steals his sister-in-law's underwear and hides to indulge in masturbation, but is caught and the NEET younger brother hurriedly apologizes, but...