Case closed! Awright, home we go!

But getting from here back to the surface is going to be really troublesome too.

Then shall I send you back to the surface with my ability to pass through walls?

Eh...? But doesn't oxygen run short when using that method for long-range movement?

Not a problem! If you don't breathe, not only can you build up your lung capacity...

...but by holding out, it starts to feel good really quickly!!

Seiga-san...

Oxygen deficiency...has made your brain...