The three exchanged glances, then Dumbledore and Lupin looked at Kayson in surprise.
"...How did you know?"
"Did you inspect it that thoroughly?"
Kayson looked at the two with strange expressions. "It's that abandoned bathroom, the one Myrtle lives in. And I swear on my character that it has absolutely nothing to do with me... Holmes deduced it. Besides, shouldn't you be thinking about why Slytherin's Chamber of Secrets would be in the girls' bathroom?"
"Looks like he's the biggest pervert here."
"We were only making a hypothesis," Dumbledore explained.
"...It'd better be."
The three of them strolled out of the Alchemy office. The instant Kayson was about to step over the threshold, it felt as though he passed through a layer of water.
"Fuck, this really is another me in the world."
He stared dumbly at the blue sky and white clouds before him, as well as the floating island beneath his feet. Clear spring water flowed from somewhere unknown, headed somewhere equally unknown.
A Kayson who looked slightly older than him appeared before him.
"I know you have questions, but don't speak yet. I'm you—roughly ten years from now. When Neville was in his seventh year, in 1998, you made that crazy idea in your head a reality. You successfully gave everyone in the world magic."
"Oh..."
"Don't interrupt... Then a magical world war broke out. I'm telling you, at least a billion people died in that war, so I'm advising you now to quickly give up that crazy idea."
"Because if you don't, the current me is a civil official, here to reason with you. The me from nine years later who'll show up soon is a general, and he's coming to hunt you down!" Future Kayson rattled it all off in one breath.
"...Wow..." Kayson was