I fainted for half a day after I ate the enemy leader’s brain. The wall clock in the kindergarten was showing four in the afternoon by the time I got back to my senses.

I massaged my temples as I picked myself up and saw that Kim Hyeong-Jun was still in deep sleep, snoring away. I got up to stretch and then trudged toward the night-duty room. Even with the sun up, the night-duty room was pitch black.

I twitched my nose at the musty smell and looked around. There were countless dead bodies on the floor, along with Mr. Kwak’s. I wondered what had happened. As I took a look at the zombies, I realized that all of them had similar facial expressions.

I saw blood coming out of their eyes, nose, mouth, and ears. The eyes of every one of them had rolled back into their heads. They showed clear signs of being in agony. I didn’t think much of it at first, but the moment I began to move Mr. Kwak’s and Ms. Koo’s dead bodies outside, it hit me.

‘Traces of pain? From a zombie?’

Zombie’s couldn’t feel pain. But I was certain that the ones on the floor showed expressions of pain, and every single one of them had bloodstained faces. I wondered if something had gone wrong with their brains.

‘There must’ve been hemorrhaging blood from their eyes, nose, mouth, and ears. But wait, that can’t be right.’

I examined their faces more closely, and felt a flicker of nervousness. Their eyes were no different from those...