His elderly father-in-law lives with his son and daughter-in-law. His son's wife is a caring person and between household chores, she massages his shoulders like this. At first glance, it may seem like a peaceful moment between family members, but in truth, his father-in-law has been sharpening his still-rusty, throbbing flesh sword day and night, aiming for the voluptuous body of his son's wife, who is patting him on the shoulders from behind... "Thank you as always, Honoka... I'll give you a massage today..."