A mother with a somewhat sloppy personality, who usually spends time with no bra. However, one day, he finds out that his son, who has no female experience, is distracted by his no bra breast and cannot concentrate on his studies. Knowing that he was the cause of his son's worries, Arisa gently presses his son's hand against his boobs. And I started to write down the forbidden brush ... Free points for the first 1,000 yen!