He's Akira's older brother and a former student at Fujimori who was known by all who knew him as "Sakamoto-sama" because of his amazing beauty. He comes back during the cultural festival to help the student council raise money. Harumi is usually very cool and smiles constantly. However, in the presence of his younger brother, he becomes completely emotional and is easily moved to tears (something which Toru and Yuujiro accidentally notice when visiting Akira, as seen in a manga filler chapter).