I told you. I killed you. [Blink. He's still getting used to this.] Akira.

I killed you, and then the world started going to shit and nothing made sense anymore. [Sigh.] I mean that literally, by the way. Society stopped caring about [Shido. The truth.] anything. It was sickening. I tried to figure it out, but [you weren't there] I came up with nothing. Then reality began merging with Mementos. It rained blood.

And then, I was erased from public cognition as unnecessary. So I might as well have been dead myself. So you'll forgive me for assuming something had gone wrong and I'd wound up in hell.

[He doesn't actually care if Ren does or doesn't. You know he's feeling somewhat better when he's able to be sarcastic.]