Kamen Rider Kyuseishu

a college student named Nakashima Kazuma, ever since the death of his mother and father, has fallen into a deep depression. He is constantly bullied by a guy who picks on him after school, his only support are his two childhood friends, Daigo and Yumiko, until one day, a race of monsters called Darkmares attack the city, until Nakashima finds a strange belt, and becomes a new hero.