Tsumugi Akari, a married woman under pressure from her mother-in-law about not having children yet, finds herself on a family trip to a hot spring resort. However, one month prior to the trip, she was ordered by her mother-in-law to abstain from sexual activities due to their childlessness. On the day of the trip, both husband and father-in-law are denied sex by Tsumugi and her mother-in-law respectively. Feeling frustrated and horny, they decide to visit the hot springs to relax their tense bodies. By chance, Tsumugi's father-in-law catches a glimpse of her undressed in the bath area and can't control his desires any longer...

姑から孫の出産はまだかと圧力をかけられている嫁・つむぎ。ある日、家族揃って温泉旅行へ行く事になった。しかし子作りの為に旅行までの1カ月間、姑から禁欲を命じられてしまう。そして旅行当日、あろうことか夫にSEXを断られてしまうつむぎ。一方、義父も妻を抱こうとするが同じく断られてしまう。性欲を持て余す二人は、悶々とする身体を落ち着かせる為に温泉へ向かった。そして、偶然にもつむぎの入浴姿を目撃した義父は欲望を抑えきれず…。