(Yuri recently heard that sexy briefs are popular among young people... never expected her son Daisuke to be wearing such underwear...) When she accidentally catches sight of her son, she notices the fabric tightly pressed between his legs, clearly outlining the shape of his penis. Her heart races as she feels an unexpected surge of excitement. With her relationship with her husband growing cold and her sexual frustration building, the intensely lewd sight overwhelms her restraint, driving her to take forbidden action...