Mai is a single-mother of one and talented pianist who works in a small bar at night in Roppongi. When she is given an offer to rejoin her old band, she accepts the offer. But in the pursuit of her dreams, guilt sets in as she worries about her daughter Mai is friendly and warm, but also cheeky and adventurous, which makes her a social butterfly in the nightlife of Tokyo. But she's still very sensitive and her fear of rejection can make her spoil those around her