According to the official site: http://www.s-inc.com/hangry-angryHANGRY&ANGRY Fの「F」はフューチャー、ファッション、 ファック!の「F」HANGRY&ANGRY F's "f" is "future", "fashion" and "f ● c k!"'s "f"
WERD. i have no link. it might be on the f site then. http://www.s-inc.com/hangry-angry/future/