Mother-in-law Mari Ai who made a new swimsuit before summer.When I was standing in front of her mirror and doing a swimwear fashion show, Haruto, her son-in-law, came there.Mari Ai, who notices Haruto's glamorous body and racy bikini look that is beyond imagination, demands an oil massage with a mischievous heart.Her mother-in-law's voluptuous, lustrous and stimulating body that she touched for the first time... Clearly Haruto's caresses, which deviated from the level of massage, made Mari Ai's breathing rough, and finally the two crossed the line between parent and child.