Upon opening the door, Nanami, Mamori’s sister, appears with a voluptuous body and large breasts. With a cold expression, she offers direct sexual relief, manipulating him with a handjob and intense blowjob that leads to multiple orgasms. Despite her instruction to only rub against her panties, he ends up penetrating and ejaculating inside her without permission. He remains aroused and uses various parts of Nanami’s body to reach another climax, but accidentally splashes semen on her prized smartphone.

The protagonist accidentally ejaculates on Nanami’s smartphone, fearing he’s angered her, but instead, they start an intense sex session. Using her curvy body, Nanami challenges him to continue, milking him for all he’s worth. When they run out of condoms, she provokes him even more, leading him to focus on her sensitive spots. They end up having sex with maid cosplay, and during a package delivery, they engage in an extremely passionate encounter, culminating in internal ejaculation in both her ample backside and sensitive vagina.