 If you liked
Bleach
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 ...then you might like
Monochrome Factor
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Starts out with the hero gaining a super power to help fight off an infestation of monsters from "The Shadow World"/"Hueco Mundo"
Both recruit an assortment of other super power guys from their close friends at high school
Both have about a 5-10 man group of heroes fighting a 5-10 group of bad guys in a series of battles
Bleach is higher quality, but monochrome doesn't completely change its storyline every couple seasons.