Synopsis
Freshman Kaho Nikaidou comes from a powerful family, so nobody has ever spoken a harsh word to her, afraid of angering her household. Wanting to be around people who won't treat her differently because of her background, she moves into a dormitory for the new school year. Shortly after arriving, Kaho accidentally steps into traffic and is saved by a tall, handsome stranger. When she asks his name, he calls her weird and walks away. Having finally met someone who would say something unkind, Kaho instantly falls in love with her rescuer. Meeting him again, she learns his name is Kanade Takahashi and confesses her feelings. Kanade says he'd like them to be a couple, but warns Kaho she might not want to date him once she learns his secret. To her shock, Kaho discovers the startling truth: Kanade is a fifth grader! Deciding she cannot date a fifth grader, Kaho intends to break up. But as she spends more time with Kanade, she grows to care for him even more and continues the relationship. Hatsukoi Monster follows Kaho's first steps into love with Kanade, her immature yet kind fifth grade boyfriend.