...I know. It's...I've done a lot of late nights.

[otto's well-versed in the language of hyperfixative foolishness, so he can probably read between the lines: this kid probably doesn't sleep until he feels tired. or his body makes him. or someone else makes him.

give a kid like that the ability to not need sleep, and, well. he can surely imagine how yusei got to this point.]

...I'll sleep when we get our powers back. At least then I know that my body won't give out on me in my sleep.

[yikes! that's a morbid thought.]