Nathaniel's ordinary commute becomes extraordinary when he and 23 other passengers—plus a corgi named Biscuit—find themselves trapped in a "Hell difficulty" tutorial. Forced to battle monsters, gain experience, and master his formidable mana manipulation abilities, Nathaniel has five years to fight his way back to Earth. Alongside his eccentric allies, he confronts horrific creatures, wrestles with impossible choices, and races against time to survive. Will he emerge victorious, or will this isekai nightmare consume them all?