Lycanthrope Leo (1992)

Blurb:
Lycanthrope: Leo Takizawa is the star of his high school track team. On his 17th birthday, he breaks Carl Lewis’s record. Impossible? But this is only the first of the extraordinary abilities Leo begins to manifest. Unfortunately, he learns the painful truth about himself the hard way... Leo: Now Leo’s very life depends upon his ability to distinguish between his allies and enemies, both of whom walk the corridors of his high school. As a member of the "Tribe of Lion", the most powerful of all lycanthropes, Leo must learn to control his extraordinary powers to avoid revealing himself. But when school bullies attack his best friend, does he have any choice but to unleash the beast within?

Source: www.anisearch.com/manga/2193