Satanophany , a Seinen manga by Yoshinobu Yamada serialized in Weekly Young Magazine since 2017, follows Chika Amagi, who is confined to Haguro Island Prison after her "Medusa Syndrome" triggers brutal violence. The series blends psychological suspense and "ero-guro" elements, focusing on inmates subjected to experiments that adopt the mindsets of notorious serial killers. For more details, visit Wikipedia .