After joining the family-run sake brewery for three years, I married the president's daughter, and since then, my father-in-law has been pressuring me to have a successor soon. Even on this family trip with our four-member family to a hot spring, my father-in-law's intention was for us to conceive a child. Amidst the pressure, I abstained and prepared my sperm fully for the trip, but my wife fell ill. Struggling to sleep on a restless night, I wandered the inn, contemplating a breath of night air, when I accidentally witnessed my mother-in-law's bath scene...