Shota's father is the president of a company and has to go on a sudden business trip overseas. During that time, Shota is looked after by his beautiful secretary. The secretary's butt is so big that it's tight under her tight skirt, which surprises Shota and gets him excited! Taking advantage of the fact that he's a child, he drives a mini car over his sister's butt and breasts, and does all sorts of naughty body touching! To top it off, he accidentally puts his penis into her vagina in the bathroom...!?