Hitomi was asked by her husband's friend to be their son's tutor. Unable to refuse when asked, Hitomi is currently teaching Kouichi, who is repeating his second year of high school. However, Kouichi only pays attention to Hitomi's breasts and can't focus on his studies. Eventually, he even starts saying that if she lets him touch her breasts, he'll study seriously. Hitomi lets him touch her chest, but his desires gradually escalate...
