"Classmates" is a manga series that explores the evolving relationship between two high school students, Rihito Sajou and Hikaru Kusakabe. Rihito is a reserved and academically focused student, often seen as aloof by his peers. Hikaru, on the other hand, is outgoing and passionate about music, playing in a band with his friends. Their paths cross when Hikaru notices Rihito struggling to sing during a choir practice and offers to help him improve. This initial interaction sparks a connection between the two, leading to a deepening friendship that gradually develops into a romantic relationship.

The narrative delves into the complexities of their bond, highlighting the challenges they face as they navigate their feelings for each other. Rihito’s introverted nature and uncertainty about his emotions contrast with Hikaru’s more open and expressive personality. The story portrays their journey of self-discovery and mutual understanding, as they learn to communicate and support one another. Secondary characters, such as their classmates and bandmates, add depth to the story, providing context for their school life and social dynamics.

The manga captures the nuances of adolescence, including themes of identity, acceptance, and the emotional turbulence of first love. The pacing allows for a gradual exploration of the characters’ growth, both individually and as a couple. The setting, primarily within the school environment, serves as a backdrop for their interactions, emphasizing the significance of their shared experiences. Through its focus on the evolving relationship between Rihito and Hikaru, "Classmates" offers a heartfelt portrayal of young love and the challenges of coming to terms with one’s emotions.