Birthday: November 22

Hiroki is 28. He is the professor’s Miyagi assistant in the classical literature department of University. Formerly a childhood friend of Usami, he used to be madly in love until the day his path crosses Nowaki.

Hiroki has a very passionate personality. He is a loner yet extremely temperamental. His students complain about how he does not hesitate to throw things at them when they are not paying attention in class.