Ryuji Takasu, a high school student entering his second year, is struggling with his appearance. Despite having a kind and gentle nature, his sharp eyes often give others the mistaken impression that he is a delinquent, which frustrates him greatly. He is quite happy to have his close friend <Yusaku Kitamura>, Hirofumi Nojima, as his classmate, as well as harboring feelings for the cheerful and energetic <Minori Kushieda>, Yui Horie.
One day, Ryuji unexpectedly encounters Taiga Aisaka, an intensely volatile girl who is widely known as the "school's most dangerous animal of the highest risk level." Interestingly, Taiga is the best friend of Minori, and she has a fiercely negative attitude towards almost everyone, often snapping violently at those around her. Taiga’s personality makes her instantly dislike Ryuji, and matter-of-factly, she lives in an apartment facing Ryuji's house, which leads to numerous awkward and humorous interactions between the two.
As the story unfolds, Ryuji learns that Taiga secretly has a crush on Yusaku, while Taiga discovers that Ryuji is infatuated with Minori. To help both of their romantic pursuits, they strike up an unusual arrangement to help each other set up dates and romantic opportunities. Their efforts to assist each other in love often result in comic mishaps and backfiring situations, which add to the series' charm and humor.
Despite their initial misunderstandings and constant bickering, Ryuji and Taiga gradually form a genuine connection. Their classmates start to notice how much time they spend together, fueling rumors that they might actually be a couple, which they both try to deny. However, through shared meals, helping each other get to school, and even cleaning for one another, they grow closer and develop a friendship that hints at deeper feelings.
During the series, they also meet <Ami Kawashima>, a charming yet somewhat spoiled teen model and Yusaku's childhood friend. Ami, portrayed by Eri Kitamura, presents herself as friendly and ditzy, but beneath her bubbly exterior lies a sharper, more spoiled personality. Her presence initially causes tension, especially with Taiga, who finds Ami’s antics difficult to tolerate. Nevertheless, Taiga makes an effort to endure Ami's behavior, especially since Yusaku wishes for everyone to get along. Over time, Ami starts to develop feelings for Ryuji, adding another layer of complexity to the relationships.
Throughout What's After the Movie, viewers follow the intertwined lives of these friends as they navigate the challenges of adolescence, friendship, and love. Their journey is filled with comedic misunderstandings, heartfelt moments, and the realization that sometimes, the people we least expect to fall for can become the most important to us. The series highlights how friendship and love can blossom unexpectedly and how individuals grow through their experiences and interactions with one another.