well as for now, they are probably still analyzing the problem
if the rewards are not sent after the web is up, try contacting nutaku again

Ladies and gentlemen, Nutaku will screw us with another elite guard event.

I got this from Kurito a min ago (unless that was a glitch from reward system). This plus the announce on FB can confirm it.

While another guard event is possible, getting that from Kuri-chan isn't a sign of anything. That's always in her loot table. Heck, its one of the first things I got when I fed her the first week of the game. Got a bunch of drinks, elixirs, glasses and compasses before I even got anything worthwhile out of that thief.

JP players seem to be leaning toward it being a tower event though, where the slayer cards boost your points which overall ranking is based on.

no worries, it won't expire that easily^^