[Cum Swallowing NTR While Her Girlfriend Is Away] Dai and his childhood friend Yui are being trained to swallow by his sex friend who has a girlfriend. Yui knows she is being played with, but every day she drinks the semen that her girlfriend doesn't drink, confirming her sex friend's love for her. "I really want him to cum inside me," she thought. When her childhood friend Dai confesses his love for her, she has sex with him in desperation, drinks his semen... And then Dai cums inside her, which her sex friend wouldn't do. Where does this sad love triangle lead?