妻と子作りの為に一ヶ月禁欲して溜め込んだ僕の精子をいつも横取りする義姉

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.