The playboy of Koharu High School and highly suggested that he sleeps with many of the girls at school, refering it to them having some "coffee". When Takeya's actions put Ren in doubt of his feelings for her, Hiro tries to seduce her away from her master. Even when he admits to "really liking" Ren, (the closest he'll ever admit to loving someone), Ren still only thinks of him as a friend. Eventually, Hiro gives up on her, and to his horror, Xaki has now formed an attachment to him, and makes any girl too scared to approach Hiro. In the Japanese version, Hiro-kun usually call girls "Koneko-chan" whatever their real names are. The word means something close to "kitten".