That's not Gerorin singing if he's not shouting even once in a song (except maybe his Just Be Friends cover which was relatively tame but not less beautiful). Check him up on the Utaite Wikia. (quote: [Gero (げろ), nicknamed Gerorin, is an utaite known for singing loudly and "passionately" (versus "logically") in his covers.]) It's his trademark style, haha