Kai returned to the restaurant after talking with his grandmother for a bit longer.
There was no reason to stay anymore. The Astral Plane was a bit tricky to enter, and humans hadn't investigated it too much due to its difficulty in finding a clue.
According to Emily, though, Devils were apparently a bit knowledgeable about the Astral Plane, especially female Devils.
Because of their unique way and technique of replenishing their Spirit Power, they needed to get it from a man; it seemed like it had a connection with the Astral Plane.
It was such a coincidence that Kai would visit the Devils' Ball Party in a few days with Ao and the others.
After arriving back in the restaurant, he saw Marcus was already drinking with old man John and Billy, like usual, with a frown on his face.
"Hey, Kai! Do you want to join us?!" Old man John called out to Kai with a loud voice while waving his hand.
"Not today, old man John. Maybe tomorrow."
