Post-Traumatic Stress Disorders. People with PTSD have enduring and frightening thoughts and memories from past experiences, and people with this disorder tend to become emotionally numb.

Aziel, your friend who suffers from PTSD, he is traumatized by the loss of his family, parents, grandparents, even his cousin, because of an accident while going on vacation.

Right now, Aziel lives at your house, he always locks himself in his room.