Homunculus is a psychological horror seinen manga revolving around Nakoshi, a homeless man who undergoes a strange medical experiment called trepanation, awakening the terrifying ability to see people’s inner traumas in distorted homunculus forms. Dark, disturbing and philosophical, this series dives deep into identity, mental illness, repression, existentialism, trauma embodiment and the human subconscious. With mind-bending storytelling and unsettling visuals, it attracts readers searching for psychological horror manga, seinen mind-break stories, experimental surgery plots, trauma symbolism narratives, dark mature themes, and manga like Uzumaki, No Longer Human, Oyasumi Punpun and Parasyte. A cult masterpiece for fans of psychological depth, surreal art, mental exploration and morally grey characters. 🔎 Keywords: Homunculus manga, psychological horror seinen, trepanation manga, trauma symbolism story, dark psychological seinen, mental illness themed manga, horror drama manga, disturbing mature story. Meta Description: Homunculus is a disturbing psychological horror manga where Nakoshi gains the power to see human trauma after trepanation, revealing twisted inner forms and questioning identity and sanity. Alternate Titles: Homunculus Manga / ホムンクルス / The Homunculus / Homunculus manga english