Kyosei

Labeled as a delinquent and bad influence, high school student Kyosei Ichinose choose to stay out of the people around him, indulge himself to his headphones, pick fights against other people and stay alone. 

He was later famous for being a dangerous fellow that even his fellow students and his teachers feared him.

One day, everything is normal until the world is now in turmoil after the appearance of a mysterious disease that turns humans into mindless cannibals, infecting humans all around the country in an alarming state.

After receiving a distressed message from his former friend, he reluctantly returned only to find the school overrun by the dead. Armed with his house keys, a revolver and a duffel bag containing a few items to aid the rescue, he returned to the school without knowing why he still need to rescue a former friend.

Outbreak Chronicles: Dead Pandemic

Ah, that's right. I got a headache and I succumb to the pain...If that is the case, then that means I died? So this is the afterlife? But that is strange, I don't think this is what the afterlife is described by many, even the so-called Heaven and Hell is not even similar here. I don't even know if this the place they call Nirvana either.

One thing is sure and that is, I am floating in nothingness. There is nothing around me and nothing beneath and above me, not even the sky and the ground. So, what the hell happened and why am I here? If I am dead, how come this is just nothingness?

"You are overthinking things, Kato. Death is momentary and once you die, there is nothing else for you to feel. The fact that you are still able to feel what is happening to you means you are still alive.

Deadly Variant Awakening