"Tende Shōwaru Cupid" centers on the life of Itsuomi, a high school student who is known for his aloof and seemingly unapproachable demeanor. Despite his cold exterior, Itsuomi harbors a deep-seated belief in the concept of soulmates, a notion that stems from a childhood encounter with a mysterious girl who left a lasting impression on him. This encounter shaped his worldview, leading him to believe that everyone has a destined partner, and he is determined to find his own.

The narrative unfolds as Itsuomi crosses paths with Ruka, a cheerful and outgoing classmate who is the complete opposite of him in personality. Ruka is initially drawn to Itsuomi due to his enigmatic nature, and their interactions gradually reveal the complexities of their personalities. Ruka’s optimism and warmth begin to chip away at Itsuomi’s guarded exterior, while Itsuomi’s unwavering belief in soulmates challenges Ruka’s more pragmatic views on love and relationships.

As the story progresses, the dynamic between Itsuomi and Ruka evolves, blending moments of humor, tension, and emotional vulnerability. The manga explores themes of fate, self-discovery, and the nature of love, as the characters navigate their feelings and question whether love is something predetermined or something that can be cultivated over time. Supporting characters, including friends and classmates, add depth to the narrative, providing contrasting perspectives on relationships and contributing to the protagonists’ growth.

The plot is driven by Itsuomi’s quest to find his soulmate, which often leads to misunderstandings and comedic situations, particularly as his interactions with Ruka grow more intimate. The series balances lighthearted moments with introspective scenes, creating a narrative that is both engaging and thought-provoking. Through its exploration of the protagonists’ evolving relationship, "Tende Shōwaru Cupid" delves into the complexities of human connection and the ways in which love can defy expectations.