Kei’s in-laws eagerly await a grandchild. During a family hot spring trip, his father-in-law demands he abstain from ejaculating, saving sperm for the occasion. Holding back for a month, Kei’s at his limit. At the resort, he tries to fuck his wife, but she refuses, wanting to soak in the springs first. Disappointed, Kei mistakenly enters the women’s bath and sees his mother-in-law’s alluring body. Her image consumes him. Back in their room, even though his wife agrees to sex, Kei only thinks of her mother. That night, he sneaks to the women’s bath to spy again. Overwhelmed by lust, he rushes in, ravishes her, and impregnates her. Regaining senses, he apologizes and flees. Long without sex, his mother-in-law, thrilled by her young son-in-law’s vigor, can’t forget it. That night, they meet again without words, diving into passionate sex. Later, she’s pregnant. Though surprising, Kei’s wife and father-in-law don’t suspect the baby’s origin...

Diễn viên: Yuna Shina