Takashi's girlfriend, who he lives with, is going on a trip for a week, so he's going to be alone for the first time in a while. However, before she leaves, her best friend comes over to his house for a drink, and while she's drunk, he suddenly becomes close to her. After she leaves, her best friend comes over again, and they start a life of creampie sex every day for a week until she comes back... A story of unlimited creampie sex with her best friend, who has a quiet face, I-cup breasts, and a strong sex drive.