From the day he had sex with a friend's girlfriend while drunk, he secretly had sex with his friends and family multiple times during his senior year summer vacation. (Zi Guangli, YUJ-027)

Summer vacation during my senior year of university. Everyone's future paths are being decided, and I'm enjoying my last summer break as a student. Today, I'm drinking with my friend Yu-fu and his girlfriend, Hikari, at our usual bar, following the same route. How many more times can I have a life like this…? For some reason, I don't want to go home, so I'm drinking again at my place. When I wake up, I find Hikari snoring beside me. She seems to have fallen asleep drunk without me even realizing it. Looking at Hikari's unguarded state, I feel inexplicably burning with desire. Even though Yu-fu is there…