"Kouta-kun, can you abstain for a month until our trip?" Suddenly, I was asked by my in-laws, leaving me bewildered. What was supposed to be a family-only hot spring trip turned into a request for me to make a baby with my wife. I managed to abstain until the day of the trip, but I couldn't help feeling restless... Trying to calm my pent-up desires, I headed to the hot spring, but accidentally entered the women's bath. There, I witnessed my mother-in-law's seductive bathing scene...