Omoi ga Omoi Omoi-san

A third-year middle school student named Karuizawa Ryo develops a crush on Omoi Miton, a cute, intelligent, and well-liked girl. When he learns she will attend an all-girls high school, he confesses his feelings to her, and to his surprise, she accepts. Omoi, however, has a detailed plan for their relationship, including transferring to his high school, marrying within two years, and imposing strict rules. Karuizawa quickly discovers that Omoi has an intense and obsessive view of relationships. Despite his worries, they begin dating, which changes the course of his high school experience.