One day, Atsushi is Kokoro by his mother's friend Aki who comes to visit his house, and is instantly captivated by her cute appearance. After a while, Aki, who has not been doing well in her private life recently, gets drunk and asks Atsushi for a kiss... Unable to forget the feeling of Aki's lips as an unexpected reward, Atsushi spends a sleepless night. When he leaves his room, he happens to encounter Aki. Both of them are hot and sleepless, so they can't stay like this and enjoy their limited rendezvous...