"Isn't it time to show me your grandson's face ...?" I couldn't hide my upset at the words released by my father-in-law. It was supposed to be a fun hot spring trip with the whole family, but I was asked to take advantage of it and make a child with my wife. As my father-in-law told me, I arrived on the day of the hot spring trip after a month of abstinence, but my wife got her period earlier than planned. When I was wandering around the inn to distract my agonizing feelings, I happened to witness my mother-in-law's bathing appearance.