After three years of marriage, Aoi and her husband have sex on every ovulation day while trying to conceive. But her expressions remind him of a sex worker faking her moans, eroding his confidence and reducing their sex life. She reassures him that size does not matter and love is more important, yet his insecurity leads him to invite a well-endowed friend to prove it by having sex with her. Watching his friend lick her body and stretch her with a huge cock as she desperately tries not to enjoy it, he is suddenly overwhelmed by regret.