First Love Monster anime
Kaho Nikaidou, a freshman, comes from an influential family. She has never heard anyone say anything that could be considered mean to her for fear of her household being angry. She leaves her home to find a place to live in a dormitory, as she doesn’t feel special. Kaho wanders in traffic unintentionally shortly after she arrived. A tall, handsome stranger saves her. He tells her he is strange and walks off when she asks him his name. Kaho is now in love with her savior, having finally met the only person who has ever said an unkind word.She confesses her love for Kanade Takahashi after meeting her rescuer again. Kanade tells her he wants them to be a married couple but Kaho might not want to go out with him after learning his secret. Kaho is shocked to discover that Kanade is fifth grader.
Kaho decides that fifth-grader Kaho is not the right person for her and plans to end their relationship. As she spends more time together, Kanade becomes more important to her and she continues to date him. Hatsukoi Monster shows Kaho’s initial steps to falling in love with Kanade (her fifth-grade boyfriend).