Ouji and Hijiri went to the same cram school in middle school and seem to be very close. Ouji regards him and Sayuri as his best friends. Hijiri is strong-minded but somehow ends up going along with Ouji's petitions, Sayuri tells Hijiri he is always spoiling Ouji.
Ouji is in love with Sayuri, but knows that Sayuri likes Hijiri. He considers Sayuri and Hijiri his best friends and will do anything he can to protect and help them. When Tsubaki tries to use Ouji for one of Kanoko's schemes, Sayuri asks him to stop messing with him.