Fukusuke Mogi, a kind but unremarkable boy, nurses a secret admiration for Yua Kureha, the most beautiful and popular girl in his class. His hopes are complicated by the fact that the person most often rumored to be Yua's partner is none other than his own best friend, Fujisaki, the ace of the school's basketball team. Resigned to feeling like a background character or a mob in his own life story, Fukusuke’s perspective shifts when he notices another girl sitting next to the radiant Yua. This is Amari Usuha, a girl who is equally cute but deliberately hides in the shadow cast by her more famous neighbor. Recognizing a kindred spirit who also struggles to stand out, Fukusuke nervously asks her to be his friend. Finding common ground in their shared circumstances, the two make a pact to practice becoming normal together, a decision that slowly begins to change their high school lives.

The main narrative follows Fukusuke and Amari as they navigate their agreement, moving from hesitant strangers to close friends. Their practice sessions involve simple social activities like eating lunch together or walking home, which gradually build their confidence and draw them closer. The story explores their growing bond and the quiet realization that what began as a friendship pact might be turning into genuine romantic feelings. This central relationship is set against the backdrop of their school, where the radiant presence of Yua Kureha and the popular Fujisaki serve as a constant, if unintentional, contrast. While Yua represents an unattainable ideal, Amari becomes a tangible and relatable partner for Fukusuke, and their journey focuses on overcoming social anxiety and finding validation outside of the popular crowd.

Early narrative arcs center on the formation of their unique partnership and the immediate, awkward, yet tender steps they take to become more socially adept. These initial chapters establish the main character dynamics and the premise of two shy individuals learning to navigate the world together. As the series progresses, the story likely delves into the complications that arise as their secret friendship is gradually noticed by their classmates, including the object of Fukusuke's original crush, Yua. The arrival of the first collected volume, which compiles these opening chapters, encapsulates the initial premise of a romantic comedy that starts with a friendship between a self-described mob character and the hidden heroine that only he has noticed. The series continues to explore the sweet and sometimes awkward process of two quiet people finding their place and each other.