My mother-in-law, Mari, bought a new swimsuit before summer. I was standing in front of my girlfriend's mirror feeling excited, doing a swimsuit fashion show... and then her son-in-law, Haruto, came over. Noticing Haruto's completely captivated look at Haruto's more glamorous body than she imagined and her racy bikini, Maria mischievously requests an oil massage. My mother-in-law's voluptuous, sexy and stimulating body that I touched for the first time