Afterlife Department.
"What is this Foul, director?" an intern asked.
"The Foul is an evil air that harms a being." Gu Shi answered. "It can confuse your mind. It can worsen your illness. It can cause you to be sick. It can also worsen your temper." He said.
"How can we cure our self if we're contaminated by Foul?" someone asked.
"Well, that's – " Gu Shi said and looked outside the glass window where the rain is heavily pouring down the earth. " – there is no cure." He answered.
…
Huo Ling hissed when he felt stung. He turned and saw Yi Bing was pulling his soul's tail. The pain is coming from it. "Yi Bing…?" he called when he saw Yi Bing's hand turned pale gray. "Ouch!" he cried when he felt the pain became stronger. If he had a body, he would have jumped out of his aching skin.
"Sorry." Yi Bing apologized and let go of his 'tail' after he pulled him farther from the Soul Eater not far from them.