He appears to be an ordinary man, but he has severe communication barriers and is a careful and silent person. Although he is not rich, he has enough to live on. He is not very dependent on working for money; instead, he enjoys his job as a forensic pathologist. His mother, who suffers from cancer, resides in the hospital where he works. He has concealed her illness from her. Since he has no other family members, he must ensure that his mother does not die. In order to raise funds for her medical treatment abroad, he becomes a hired killer.