Suguru Kamoshida is a former professional athlete and Olympic volleyball champion. He is an alumnus of Shujin Academy who later became the school's volleyball coach.
During his time as a teacher, Kamoshida's fame was used as a means to give Shujin Academy and its students more publicity, be it for scholarships or college applications. His ego, inflated by the clear favoritism of Principal Kobayakawa, caused him to blatantly predate other students.