Junpei Yoshino begins as a socially isolated high school student, his withdrawn nature and discomfort in social interactions stemming from persistent bullying. A transformative encounter with an enigmatic manipulator reshapes his trajectory, fostering reliance on their influence and stoking bitterness toward societal norms. His strained dynamic with an absent single mother gains tragic weight when her offscreen death precipitates a spiral of grief and rage—emotions the manipulator weaponizes. By framing her demise as orchestrated by supernatural factions, the figure steers Junpei toward vengeance, binding him to anti-establishment forces. A tentative kinship blooms with a transfer student, their bond built on shared interests and quiet understanding. This kindred connection fractures his embittered perspective, sparking conflict between fragile hope and entrenched resentment. Amid this tension, Junpei manifests a supernatural ability: summoning a translucent, jellyfish-like entity that discharges corrosive toxins and lashes opponents with whip-like tendrils. The manipulator engineers a loyalty test, forcing Junpei to confront his ally. Though he struggles to defy orders to harm his friend, he’s overwhelmed in a brutal clash. The manipulator intervenes, staging Junpei’s fatal injury to weaponize the tragedy against the transfer student. His final moments articulate lingering questions about belonging and hatred’s corrosive toll. Later antagonists repurpose his preserved remains as a psychological weapon against his former companion, though the effort ultimately falters.