JUL-671 I can't tell my wife even if my mouth splits open, I got her mother pregnant... During a one-night two-day hot spring trip, I lost myself and came inside her non-stop. - Kazama Yumi

It's been years since we last went on a family-only hot spring trip. My mother-in-law and wife are thrilled to be visiting the sacred sites of their favorite drama. However, my father-in-law has ordered me to focus on making a baby during this trip… Following his instructions, I've abstained for a month, but my wife is too tired to oblige. With no other choice, I went drinking with my father-in-law in the hot spring town. On our way back, trying to distract myself from my restless feelings, I wandered around the inn late at night and happened to catch a glimpse of my mother-in-law bathing…