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ge 18- Ryuho is Kazuma's rival and enemy. In course of the series Ryuho shows an "interest" in Kazuma. In the manga Ryuho displays a sexual jealously revolving around Kazuma. This is exclusive to the manga, which was made after the anime. In the anime version of s-CRY-ed, it is simply an intense rivalry which sometimes borders on hatred and/or envy. However despite his wealthy heritage and feelings, he is very much like Kazuma, although he will never admit it. Ryuho's title, given to him by Kazuma, is Ryuho, Master Of Zetsuei.

Source from Wikipeida