There's nothing to worry about.

There's nothing to fuss about...

Isn't it a normal thing if a hermit disappears from the crowd?

A very bad case of carbon poisoning has been reported in the White Wing of Phantasm Medical Academy. Some of them hold on, some others don't.

Yes, I'm gone again, and maybe forever. Yeah. I even leave my musical instruments locked in a chamber, at least until summer comes. I have to detoxify.