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

I slowly open my eyes as the pain in my head gradually fades away. Although the feeling of the pain still lingers a little bit, I am now a little bit good to move again. I slowly move towards my wheelchair and grab a hold of it before putting my body on it with some difficulty.

Once I managed to get into my wheelchair, I slowly move the wheelchair's wheels to move and went to the window of the new base.

As always, everyone is busy, no one is resting like always but they don't have the grim outlook in life. I closed my eyes and silently cried before retreating to the edge of my bed.

With most of my limbs amputated, I can no longer fight, can't do any basic things, and can't even do basic jack sh*t everyone does without anyone helping.

Kato's Pain of the Dead