Mei, Emi, and Minoru are three childhood friends who attend different schools. On a night when Mei's parents were away on a trip, they had a sleepover for the first time in a while. Actually, both Mei and Emi secretly had feelings for Minoru. A pleasant moment, the three of them attempt their first drink with whiskey brought by Mei, but quickly get drunk. Drunk Mei becomes engrossed in Minoru's virgin story and eventually falls asleep on the bed. Minoru, alone with Mei, is forcefully overwhelmed by Mei and drowns in the first pleasure. Before the excitement has even subsided, he returns to the room and this time ends up entwined with Emi as well. That night, the three childhood friends who love each other cross a heated line that can't just be friends.
