After losing his father, a son raised in a single-mother household grew up without a rebellious phase and became a college student. However, there was one worrying thing… it was the son's abnormal sex drive. The thought of him someday exploding with desire and directing it outward made her anxious. Around that time, they saw an ad online for a trip to a hot spring resort just the two of them. Before being a son, he is a man… seeing such large breasts makes one want to suck on them. Kozue was confused, but when her breasts were squeezed and licked, she felt pleasure and found herself craving her son's penis. A taboo story of mother-son incest during a hot spring trip!
