[He listens to what Izumi has to say. It fills in some gaps he'd wanted to ask Leo about, since he doesn't actually know much beyond the memory he saw, and what Leo chose to share.]

That's why he thought he had no worth, without his songs.

[Does he still feel that way, or is it better now?]

[But he's talking to Izumi, right now. All that fighting in the nightmare, is that what it was about? Clinging to Izumi, hurting everyone with his music?]

I don't know what happened to make him stop hurting, but even after that you stayed. You're still here, with Leo. That's good.

[It's not a flowery way of saying it, but he's sincere. That Izumi stayed and Leo kept his friend after all that is the best outcome he could hope for.]