Hinata Koga, a college student who works part-time at a karaoke bar, has to train the new employee, party-going Kai Kimura. At work, Kai suddenly asks: 'Koga-san, you're gay, aren't you?' Hinata has to go out with Kai so he doesn't tell anyone else. But when Kai wants to make things physical, how will he deal with Hinata's strange condition of not being able to feel anything?!