"Okusama ga Seitokaichō!" is a romantic comedy manga series that centers on the unconventional relationship between Hayato Izumi, a high school student, and Ui Wakana, his childhood friend and newlywed wife. The story begins with Ui unexpectedly becoming the student council president of Hayato's school, despite being only a year older than him. Their marriage, kept secret from their peers, adds a layer of complexity to their daily lives as they navigate the challenges of maintaining their relationship while fulfilling their respective roles at school.

Ui is portrayed as a confident, assertive, and sometimes overbearing character who takes her responsibilities as student council president seriously. Her strong personality often leads to humorous and awkward situations, especially when her affection for Hayato clashes with her public persona. Hayato, on the other hand, is more reserved and struggles to balance his feelings for Ui with the pressures of school life and the secrecy of their marriage. The dynamic between the two characters is a central focus of the series, with their interactions ranging from tender moments to comedic misunderstandings.

The narrative explores themes of young love, responsibility, and the challenges of balancing personal and public lives. The school setting provides a backdrop for various comedic and romantic scenarios, often involving misunderstandings, rivalries, and the occasional interference of other characters. Supporting characters, such as Hayato's classmates and Ui's fellow student council members, add depth to the story by contributing to the comedic and dramatic tension.

Throughout the series, the relationship between Hayato and Ui evolves as they confront external pressures and internal doubts. Their journey is marked by moments of growth, both individually and as a couple, as they learn to navigate the complexities of their unique situation. The manga blends humor, romance, and lighthearted drama, creating a narrative that balances comedic elements with heartfelt moments. The series ultimately explores the idea of love and commitment in the context of youth, offering a mix of entertainment and emotional engagement.