Nozomu Hitsuji is a poor student who's keeping a secret from his friends - that he works part time at a "boys bar" for men. But one day, Nozomu is seen walking on the streets with a male customer, by none other than his dull and gloomy biology teacher, Mr. Ichii. Nozomu is ordered to come to the biology room the next day, where Mr. Ichii gives him...