My Little Monster is a romantic comedy about Shizuku Mizutani, a girl focused only on her grades, and Haru Yoshida, a violent and unpredictable boy who has been absent from school. When Haru asks Shizuku to be his friend, her orderly life is thrown into chaos. The story follows their awkward, often hilarious relationship as the emotionless Shizuku learns to navigate feelings and the wild Haru tries to understand social norms. Readers enjoy it for the sharp contrast between the leads, the surprisingly sweet development, and the comedic, high-energy moments that balance a genuine coming-of-age romance.