Sumire, a bride under pressure from her mother-in-law about not having children yet, receives a sex ban order one month before their scheduled hot spring trip due to family planning purposes. However, on the day of their trip, she gets rejected by her husband when trying to have sex. Meanwhile, her father-in-law also gets turned down by his wife when attempting to embrace her. Both filled with sexual desires, they decide to relax their bodies at the hot springs. By chance, Sumire's alluring bathing figure catches her father-in-law's eye, causing him to lose control over his desires...

姑から孫の出産はまだかとプレッシャーをかけられている嫁・スミレは、1カ月先の温泉旅行まで子作りの為にSEX禁止命令を下されてしまう。しかし旅行当日、あろうことか夫にSEXを断られてしまう。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、偶然にもスミレの艶めかしい入浴姿を目撃した義父は、欲望を抑える事が出来ず…。