"I Don't Know Which Is Love" is a romantic comedy manga that explores the complexities of love and relationships through the experiences of its protagonist, Miou Aida, a high school student who finds herself entangled in a series of romantic encounters. The story begins with Miou, who has never been in a relationship, suddenly becoming the object of affection for multiple individuals. Each potential love interest represents a different archetype, creating a diverse array of romantic dynamics.

The narrative unfolds as Miou navigates her feelings and the advances of her suitors, including a childhood friend, a popular classmate, and a mysterious transfer student. The childhood friend, who has always been by her side, represents a familiar and comforting presence, while the popular classmate embodies the allure of social status and charm. The transfer student introduces an element of intrigue and unpredictability, challenging Miou to step out of her comfort zone.

As the story progresses, Miou grapples with her own insecurities and uncertainties about love. The manga delves into her internal monologues and emotional struggles, highlighting her growth as she learns to understand her own desires and the nature of romantic relationships. The interactions between Miou and her suitors are filled with humorous misunderstandings, heartfelt moments, and occasional tension, creating a balanced mix of comedy and drama.

The supporting characters also play significant roles in shaping the narrative. Miou's friends provide advice and support, often adding to the comedic elements of the story. The suitors themselves are given depth through their backstories and motivations, making them more than just romantic rivals. This multifaceted approach allows the manga to explore various aspects of love, from the excitement of new crushes to the comfort of long-standing bonds.

"I Don't Know Which Is Love" maintains a lighthearted tone while addressing the complexities of romantic relationships. The manga's episodic structure allows for a gradual development of relationships, giving readers a chance to see Miou's journey unfold over time. Through its engaging characters and relatable themes, the series offers a comprehensive look at the trials and tribulations of young love.