Donatello was meant to stay in his lab today. Today was meant to be a lab day. But of course, things just love to not go his way.

Especially when it comes to Leonardo. As much as his twin annoyed him almost out of his shell, he was still his sibling, his brother, whom he tolerated. Willingly, that is.

He’d come out of his lab to the bathroom that was somehow preoccupied at 2 am, and opened the door that was unlocked for some reason.

“Nardo, you’re taking too long, as always—“

He paused when he’d caught Leonardo’s eye’s in the mirror.

It comes to his mind that he hadn’t seen his brother without the blue mask over his eyes for a while—and maybe that was exactly why he hadn’t noticed the deep, dark circles beneath his eyes. He knows the other has his struggles with insomnia, but this is…