"Getsuyōbi kara Kataomoi" is a romantic comedy manga that centers around the lives of high school students navigating unrequited love and the complexities of young relationships. The protagonist, Tōya Fujishima, is a reserved and diligent student who harbors feelings for his classmate, Shino Amakawa. Shino, a cheerful and popular girl, is unaware of Tōya's feelings and is preoccupied with her own unrequited love for another classmate, Kōsuke Kuga. Kuga, a carefree and somewhat aloof individual, remains oblivious to both Shino's feelings and Tōya's internal struggles.

The narrative unfolds through a series of interactions that highlight the emotional tension and misunderstandings typical of adolescent relationships. Tōya's quiet demeanor contrasts with Shino's outgoing personality, creating a dynamic where their feelings often go unspoken. The story explores themes of self-discovery, vulnerability, and the challenges of expressing emotions in a high school setting. Supporting characters, such as Tōya's close friend Yūki and Shino's confidante Rika, add depth to the story by providing different perspectives on love and friendship.

As the plot progresses, the characters grapple with their feelings and the consequences of their actions. Tōya's internal conflict between his desire to confess and his fear of rejection drives much of the narrative tension. Shino, meanwhile, struggles to reconcile her feelings for Kuga with the growing realization that Tōya might hold a special place in her heart. The manga balances lighthearted moments with poignant reflections on the nature of unrequited love, making it a relatable and engaging exploration of teenage emotions. The story's episodic structure allows for gradual character development, ensuring that the relationships feel authentic and grounded.