"Kyo, Koi wo Hajimemasu" centers on Tsubaki Hibino, a high school student who becomes the target of Kyouta Tsurugi, a popular and handsome classmate with a reputation for being a playboy. Tsubaki, initially uninterested in romance, finds herself entangled in Kyouta's persistent advances. Despite her resistance, Kyouta's charm and determination gradually break down her defenses, leading to a complex relationship marked by misunderstandings, jealousy, and emotional growth.

The narrative explores themes of trust, vulnerability, and the challenges of navigating young love. Tsubaki struggles with her feelings for Kyouta, wary of his flirtatious nature and past relationships. Kyouta, on the other hand, reveals a deeper, more sincere side as he genuinely falls for Tsubaki, though his inability to express his emotions clearly often causes friction. Their dynamic is further complicated by external factors, including rival love interests, societal expectations, and personal insecurities.

Secondary characters, such as Tsubaki's friends and Kyouta's acquaintances, add layers to the story, providing support, conflict, and comic relief. The series balances lighthearted moments with dramatic tension, creating a compelling portrayal of teenage romance. As the story progresses, Tsubaki and Kyouta's relationship evolves, highlighting their individual growth and the deepening bond between them. The manga captures the emotional highs and lows of first love, making it a relatable and engaging read for fans of the romance genre.