When I returned to my parents' house, my younger sister who grew up with a body that seemed to be delicious welcomed me with a smile. But he suddenly turned on the tele and activated tsundere mode saying, "I don't feel lonely even if my brother isn't here." When I saw her sister's underwear, I got angry and said, "My brother's lewd!" But my sister who loves her brother secretly masturbates with her brother's pants! I saw it...
