Since her student days, Yumi, my wife, has experienced muscle soreness after exercising for the first time in a long while. My cohabiting father-in-law, Kazuo, saw Yumi like this and came up with a wicked idea. "Let me give you a massage!" He lied about having a license as a judo therapist and began to grope Yumi's body. Although she noticed something was off midway, Yumi succumbed to Kazuo's smooth talk and physical pleasure. Having gotten a taste of it, Kazuo's lewd acts escalated day by day...
