Brotip: Even if you can, don't do this OOBE shit unless you're sure that your house have protection against spirits, shit will try to sneak in when you're not there.
No I'm not talking about a manga
Edit: Oh wait it do happen in this manga
The scariest part is these two, and we the readers, have no idea about how the astral environment works. If a bunch of evil spirits gang up on you, what are you going to do? Call the astral police?