Kage's long lost brother?

Also what the heck just happened, I really hope it isn't a joke

I think Kage and SP are teaming up to pull a practical joke on us.

 

Sigh. Once again, you all prove to be dull as can be. The point went completely over your heads. This time it was just a simulation, but the way you maggots are now you’ll never know when a yandere subtlety slithers her way into your life, and without proper care of the situation you’ll be done for in far less than a week. Remember, people, notice the signs, it could save your life!