Phantom of Inferno

Phantom of Inferno is an action thriller visual novel written by Gen Urobuchi. Like most visual novels, the gameplay consists of reading the text on screen and periodically making a decision through the eyes of the protagonist that will influence the direction of the story. It contains scenes with sexual content and does not include voice acting.

The story follows a Japanese boy who is kidnapped by a syndicate of assassins after witnessing a gruesome murder during a trip to America. Impressed by the boy's will to survive, the group responsible for the murder and his kidnapping wipes his memories, intending to shape him into an assassin himself. Upon awakening in his new life, the boy is given the codename "Zwei" and is forced to train under the organization's top assassin - or "Phantom" - a girl codenamed Ein who is no older than himself. After Zwei completes his training and progresses onto his first assignments, he faces danger and betrayal as he learns that not all of his allies are truly as they seem, followed by a new dilemma when Inferno threatens to draw an innocent girl into their ranks, mirroring the events of his own past.