Homunculus, created by Hideo Yamamoto, is a psychological thriller manga that delves into the depths of the human mind. The story follows Susumu Nakoshi, a homeless man who agrees to undergo a dangerous experimental surgery to unlock his sixth sense. As a result, he starts seeing grotesque and distorted versions of people, known as homunculi. Homunculus explores themes of perception, identity, and the blurred lines between reality and illusion, making it a captivating read for fans of psychological manga.