The boy "Nao" who was worried that he was bigger than his short back, now he is confident that he often has sex with his sister-in-law's friends "Nagisa" and "Yukiko". On the other hand, my sister-in-law's "Chiaki", who was thrilled by her younger brother, accepted a forcible invitation from her younger brother .
Meanwhile, over at the hamburger shop, kinky doings are transpiring. The manager likes to administer sexy punishments when his female clerks break the rules. Eventually, Masaru is invited to the party and finds a family affair waiting for him...