"Make Me Happy" centers on the life of Yui, a high school student who struggles with feelings of loneliness and disconnection despite her outwardly cheerful demeanor. Her life takes an unexpected turn when she encounters Haruto, a mysterious transfer student with a reputation for being aloof and unapproachable. Haruto, however, harbors a unique ability: he can perceive the emotions of others through a faint aura surrounding them. Intrigued by Yui’s conflicting emotions, he begins to take an interest in her, leading to an unlikely friendship.

As the story progresses, Yui and Haruto navigate the complexities of their growing bond. Yui’s past is gradually revealed, including her strained relationship with her family and her lingering guilt over a childhood incident involving her younger sister. Haruto, meanwhile, struggles with the burden of his ability, which often isolates him from others due to the overwhelming intensity of their emotions. Together, they confront their personal struggles, with Haruto helping Yui to open up about her feelings and Yui providing Haruto with a sense of normalcy and acceptance.

The narrative explores themes of emotional vulnerability, healing, and the importance of human connection. Supporting characters, such as Yui’s childhood friend Rina and Haruto’s estranged older brother, add depth to the story, each contributing to the protagonists’ growth. The manga balances moments of introspection with lighthearted interactions, creating a nuanced portrayal of adolescence and the challenges of understanding oneself and others. The plot unfolds through a series of emotional revelations and small, meaningful gestures, culminating in a resolution that emphasizes the transformative power of empathy and mutual support.