The “sevens” are outdated models that have long been out of date and taken out of service. Their memory has been erased and rewritten countless times, but they continue diligently carrying out their functions for people. However, someone stubbornly keeps restoring their original settings, bringing back old memories. The game begins—where the player enters with an ace up their sleeve. Sacrificing something small, they believe in victory.
But the awakened Seven has other plans for the game.