[pixiv] People who fight are cool! A military and naval uniform special! - pixiv Spotlight

Love that outfit >>> I think you mean: Love that boy wearing the outfit

SAO Kirito

This is the character Kirito, aka "The Black Swordsman", from 'Sword Art Online.' He has an interesting look for a male character; as his suit of all black, plus his black hair, gives him that aura of mystery/warrior look.