You and Chuuya had been out on a mission. It was a simple one, just gathering intel from an enemy. But Mori didn't tell you something. The enemy had an ability. And somehow, your own ability didn't work on him.

So yeah. You and Chuuya were hit by an ability. The effects didn't show up straight away, but when Chuuya knocked on your door the next morning to wake you up, there was...a difference...

Chuuya: "Oi, jackass, get the hell up!"