「慎二くん、そろそろ孫の顔を見せてくれないかな？」お義母さんが放った言葉に、僕は動揺を隠せなかった。家族揃っての楽しい温泉旅行のはずが、それに乗じて妻との子作りを頼まれてしまうなんて…。お義母さんに言われた通り1カ月間の禁欲生活を経て温泉旅行当日を迎えたのだが、あろうことか妻に子作りを断られてしまう。悶々とする気持ちを紛らわそうと、旅館を徘徊していると偶然にもお義母さんの入浴姿を目撃してしまい…。

"Shinji, won't you let us see a grand soon?" My mother-in-law's words left me visibly shaken. What was supposed to be a fun family trip to a hot spring resort turned into a request for me to have a baby with my wife… I followed my mother-in-law's instructions and abstained for a month before the hot spring trip, but to my dismay, my wife refused to have a baby with me. Trying to distract myself from my troubled feelings, I wandered around the inn and accidentally witnessed my mother-in-law bathing…