The son-in-law, who works as a teacher, has made it his daily habit to massage his mother-in-law Yukari, whose shoulders are stiff because of too much milk. However, the son-in-law's real purpose is to turn that plump body into a hand! The massage gradually became excessive, and one day, when Yukari realized that she was not wearing a bra, her son-in-law's lust exploded! I grabbed my long-awaited breast and sucked harder than my daughter-in-law. And taking advantage of Yukari's kind personality, the son-in-law further escalated the domestic situation. ＃Group leader P