Saitama, a disgruntled and overworked businessman who never gets a moment to relax, gives himself three days to choose whether to quit his job or not. The first night, he decides to drink himself stupid and chances upon a high class bar. He goes in and settles in at the bar for a night of terrible drinking. Halfway through his first drink, he hears the most beautiful, hypnotizing voice he had ever heard. It throws the stress from his shoulders, makes him forget about his job, and makes him, for the first time in ages, feel okay. He turns around and sees a young, gorgeous blond singing into a microphone. He asks the bartender who that is and she tells him that’s Genos, their resident lounge singer.