The narrative follows , a cyber-officer with amnesia, as he navigates two timelines: a dystopian present where humans use brain chips to connect to a virtual AI world, and his past as a student.

: Combat relies heavily on timing, animation canceling, and dash management rather than button mashing.

: You control "Simulacrums" with a branching tech tree featuring over 100 unique weapons that gain experience and evolve as you use them.

: Players are often locked into specific routes (starting with Rain Kirishima) and must complete them in order to unlock subsequent branches and the true ending.

: The game uses flashbacks to reveal the truth behind "Gray Christmas," a tragic event that destroyed a city and killed thousands.