Cute and mischievously charming Kawahara Minori engages in an affair with her boyfriend's friend while he's right beside them. Minori enjoys a party with her boyfriend and his friend, but the boyfriend eventually grows exhausted and falls into a deep sleep. Seizing the opportunity, she confesses her feelings to his friend. They quietly exchange kisses, indulge in breast play and blowjob, culminating in an intense internal cumshot. In another scene, while her boyfriend is cooking in the kitchen, Minori secretly sneaks kisses, receives fingering and cunnilingus. Even during dinner, they stretch their legs under the table to stimulate each other's genitals. Unaware of their actions, he remains oblivious and falls asleep once again. Taking their chance, they move into the bedroom and finally make love, pouring out their emotions. Despite suppressing their moans, the atmosphere between them is incredibly passionate, making this intimate time between just the two of them feel so special that not even a best friend should ever interfere.