"Peach Pudding" is a romantic comedy manga that centers on the lives of two high school students, Momo Kawashima and Rui Hananoi. Momo is a cheerful and energetic girl who loves cooking and often prepares meals for her classmates. Rui, on the other hand, is a quiet and reserved boy who excels academically but struggles with social interactions. The story begins when Momo accidentally drops her homemade peach pudding in the school courtyard, and Rui, who happens to be passing by, helps her clean up the mess. This chance encounter sparks an unexpected friendship between the two.

As their relationship develops, Momo discovers that Rui has a secret passion for baking, which he hides due to his family's expectations for him to focus solely on academics. Momo encourages Rui to pursue his interest, and the two begin spending more time together, often baking and experimenting with new recipes. Their shared love for cooking becomes a central theme, as they navigate the challenges of high school life, including exams, extracurricular activities, and peer pressure.

The narrative explores the growing bond between Momo and Rui, highlighting their contrasting personalities and how they complement each other. Momo's outgoing nature helps Rui come out of his shell, while Rui's calm demeanor provides a grounding influence for Momo. The story also delves into their individual struggles, such as Momo's insecurities about her cooking skills and Rui's internal conflict between following his passion and meeting his family's expectations.

Supporting characters, including their classmates and family members, play significant roles in shaping the story. Friends like Yuki, Momo's best friend, and Hiro, Rui's childhood friend, add depth to the narrative by providing different perspectives on the protagonists' relationship. The manga also touches on themes of self-discovery, perseverance, and the importance of pursuing one's passions, all while maintaining a lighthearted and humorous tone.

As the series progresses, Momo and Rui's relationship evolves from friendship to romance, with both characters learning to balance their personal aspirations with their feelings for each other. The manga concludes with a satisfying resolution, as they find a way to support each other's dreams while staying true to themselves.