In "Euphoria episode 01," the protagonist Takato Keisuke and six others awaken in mysterious white rooms with no memory of how they arrived. The group includes his childhood friend Hokari Kanae, classmates Ando Miyako, Mikaba Rika, Manaka Nemu, English teacher Aoi Natsuki, and peer Byakuya Rinne. Confused and frightened, they are addressed by a "mystery voice" that informs them of a sinister game. To escape, Keisuke, the "unlocker," must perform specific acts with a designated "keyhole" heroine.

Miyako rebels against the voice's demands, leading to a horrifying scene where she is tortured for her defiance. As the terror unfolds, Keisuke grapples with his disturbing desires, feeling aroused by the suffering around him. Nemu, sensing his hidden urges, manipulates him into compliance with a kiss, cementing a dark pact.

Determined to protect Kanae, Keisuke decides to participate in the twisted game, exploiting the others to secure their escape. Will he conquer his inner demons and lead the group to freedom, or will his dark cravings consume him? This intense, psychological journey delves into the depths of human desires and moral boundaries.

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