Hiroto is a bartender at the gay bar Adamsite and a friend of Tetsuhiro Morinaga. He often provides romantic advice to Morinaga, though he occasionally tires of the persistent drama. Hiroto speaks in a distinctly feminine manner and is openly homosexual. He once supplied Morinaga with a highly effective special drug intended to make Souichi Tatsumi more compliant; the substance was later used to enhance intimate moods. Hiroto is an adult with brown hair and blue eyes and is known as a heavy drinker.