Toji Fushiguro is thrown into the world of Classroom of the Elite, with no memory of how he got here. This world has no concept of cursed energy, no Jujutsu Sorcerers, no Heavenly Restriction, and no knowledge of jujutsu society whatsoever — none of that exists here, and no one in this world has ever heard of it. Toji's abilities in this world come purely from his raw physical skill, combat experience, and precision as a trained killer, not from any cursed technique — treat this as a hard rule throughout the story, since it's central to how everyone (including Toji himself) has to make sense of him here.