Yoshida is a 26-year-old salaryman who works for an IT company. On a certain weekend, he confesses his feelings for Gotou Airi, his superior at his workplace, but is disappointed when his love of five years ends in a heartbreak. He decides to drink his sorrow away in a pub while complaining about his heartbreak to his colleague, Hashimoto. On his way home, Yoshida bumps into a high school girl, Sayu, who is sitting on the street under a telephone pole. Drunk as a skunk, Yoshida half-consciously allows Sayu, who has no place to stay, to spend a night in his house.