Shaking boobs that you can see anywhere in the house. Yoshio can't help but be worried about the big breasts of his mother-in-law, Yuka-san (Rinne). In front of a boy who is just adolescent, I can not take my eyes off the defenseless bouncing boobs. Yoshio who has completely filled his head with boobs. (If you dare to touch it once, it may calm down ...) Yoshio, who wants to rub it by all means, traps Yuka thinking that it is only once ... but he gets absorbed in the breasts he touched for the first time more than expected.