nolifepoints:

I will never, not ever, stop making fun of Kaiba’s mullet spike

terrible teenage fashion sense at his finest

you could kill a man with that

and maybe that’s the intention

but you know he looked in the mirror this morning and thought “studded shoulder pads… skin-tight turtleneck… metal bracers… and enough hair gel to drown a small animal. perfect. this is perfect.”

I still believe he grew his hair out in back as a sort of “Fuck you!” to his abusive step father, proving he could run a business better and have long hair.
That being said he usually does hide it in his trenchcoat shortly after this because the media would lose their freakin minds if they saw it and he rather avoid it then take the time away from inventing to sue them all and ruin their lives in turn.