Hitoshi who was ordered abstinence for one month for pregnancy from his wife. However, he couldn't stand it after half a month, and he secretly stopped masturbating, saying, "I have to shoot...". He is found by his sister-in-law Tsubasa... Tsubasa, who was frustrated with her husband and SEXless, was excited by his ascetic cock and she provoked him with a smile, "Isn't it full?" Hitoshi suppresses his sexual desire with reason and somehow endures until the day of fertility SEX. Then Tsubasa visits again on the day of her pregnancy SEX.