For four years, a woman secretly filmed her tennis club sister naked at home. When discovered, she took advantage of the situation and begged for sex. From that day on, she began to conceal her relationship with her family. (Hoshino Riko, START-379)

I have a lovely older sister who plays tennis. For four years, I've been secretly taking pictures of her half-naked body since I got home, until one day they discovered the photos hidden in my camera. When I bravely asked to have sex with her, she actually agreed! We keep having sex while our parents are out. I hope this relationship lasts a lifetime.