[Deep breath. Time for the infodump.] People call it the Red Hole Incident now. Ten years ago a huge earthquake levelled Tokyo. Afterward, people with weird abilities started showing up. The Boss started tracking them and he found a common thread with all of them. The abilities relied on the use of their own blood.

This place opened a couple years after that. Nearly every person the Boss noticed had this kind of ability ended up disappearing, only to show up in the events here not much later.