My mother-in-law, Hiroka, won a hot spring trip ticket in a lottery at the shopping district, so my parents-in-law and I decided to go on a hot spring trip together. If it had just been a hot spring trip, I would have been happy, but my father-in-law, who was sorry for my wife and I not being blessed with children, made a lifelong request and ordered me to abstain from sex for one month. While on the trip, I tried to approach my wife, feeling the pressure from my father-in-law and my crotch that was about to explode, but she just avoided me. As I was spending a sleepless night in agony, I happened to see my mother-in-law taking a bath...