Bleach AU: Grimmjow is the most popular student in Karakura High. When he learns a secret about his ex-best friend, Ichigo he makes it his duty to keep it hidden. But does he really want his help or will something else come from it? Grimmichi, story heavy (if you are just looking for smut then this won't interest you), lemon in the later chapters. Rated M for swearing and smut.