Ryūji Takasu, discontent about how his eyes make him look like an intimidating delinquent, prepares for the first day of his second year of high school. On the way to class, he bumps into Taiga Aisaka, a diminutive girl known for her fierce temper, who is in the same class as him by coincidence. After class, Taiga accidentally puts a love letter in Ryūji's bag, which was meant for Ryūji's best friend Yūsaku Kitamura instead. Taiga later comes to Ryūji's house that night to kill him for knowing about her secret, but Ryūji tells Taiga that the envelope was empty. Ryūji reveals that he has a love interest for his classmate Minori Kushieda, who is Taiga's best friend. To calm Taiga down, Ryūji tells her that he will do anything to help her with Yūsaku. The next morning, Ryūji finds out that Taiga lives in an apartment building next door to his house. When he visits her, he cleans the kitchen and serves her breakfast.