Exposition

Hitori was shaken from hearing the news about some Cultivation Realm's Empire was haunting him to kill him in the end. And for that, he was using the body of an innocent person, well, Ningen was at least a kind person. 

He needed something or someone to pull himself out of the new trouble thrown at him, so he decided to visit Akemi and let her in on the current events, then receive some sympathy in return.

No, he was not craving sympathy from an elder girl. Some sides of the corridors were booming with kids, and some corridors did not show a sign of even a single person.

The corridor Hitori was on was one of the later corridors. As he walked, he did not see even a single person anywhere around him. Perhaps, he thought, Atama had created a special corridor to keep everyone out and Akemi safe.