I tried to speak in my mind as loudly as I could, but I did not feel like it was any different from thinking to myself.

[Probably because... he really was just thinking to himself. He didn't have a target, not even a generic 'everyone', and literally just thought to himself in hopes that it would just suddenly magically reach someone.

He lets go of his hand when Atsumu pulls back, shoulders slumping in defeat. He felt sad thinking about it.]

And then before I knew it, a few hours has passed even when i was calling out. When I started to think I was going to die lost here, I started to think about how my brother would have handled it.

[By... cackling to himself? Apparently.]