Kazuki Kohori

Working part-time alongside Risa in Ikebe, this petite student with distinctive black and red hair quickly becomes a pivotal figure in her life. As a passionate Umibouzu enthusiast, he shares a deep bond with Risa that eventually blossoms into romantic feelings. His presence creates significant tension, especially after attending a concert that leads to Risa's temporary split from Otani. This budding romance even results in a physical confrontation when he boldly confesses his love to a jealous Otani.