My Little Monster is a heartwarming age gap romance manga that tells the story of Shizuku Mizutani, a studious high school girl who has no interest in socializing. Her life takes an unexpected turn when she is tasked with delivering class notes to Haru Yoshida, a troublemaker who has been suspended from school. Despite their contrasting personalities, Shizuku and Haru form an unlikely friendship that gradually develops into something more. My Little Monster explores themes of friendship, personal growth, and the transformative power of love.