Gouda holds the position of science professor at Siren Women’s Academy, his routine existence upended after shattering a seal on an ancient tree during a violent thunderstorm. The act unleashes a malevolent force that attacks him, infecting his body with a parasitic tentacle entity that seizes control of his mind and physiology. This transformation thrusts him into a hidden world of supernatural horrors centered within the academy’s walls.

Bound by shared cruelty, he forms a sinister alliance with the Director—a mysterious authority figure clad in black bondage gear—to abduct and manipulate students. Their operations escalate to ritualized assaults in the school’s repurposed church basement, where they conduct invasive experiments to harvest vital essences from young women, sustaining a primordial organism Gouda unearthed during his possession. His ambitions merge fanatical scientific inquiry with a ruthless compulsion to dominate, weaponizing the institution’s infrastructure to advance his grotesque research.

A parallel narrative introduces Professor Shimazaki, whose shadowy involvement in student exploitation and occult corruption mirrors Gouda’s transgressions. Though specifics of Shimazaki’s past are undefined, his actions similarly embody the narrative’s core themes of institutional predation and existential horror. Both figures operate as catalysts for interconnected tales of possession, authority perversion, and psychosexual terror.

Gouda’s outward appearance maintains a facade of academic normalcy, though his possession triggers erratic physical transformations during supernatural encounters. As his experiments intensify, they spark violent confrontations with students and faculty determined to expose his crimes. The narratives framing Gouda and Shimazaki forgo redemption or introspection, instead cementing their roles as unrepentant architects of self-contained nightmares that merge body horror with institutional decay.