The Hunt Begins. Tsukasa has been captured by the Crimson Knights.

Inside, Lady Subaru meets him for the first time.

Their meeting is interrupted, as Sora breaks in to free Tsukasa.

But the path to freedom is blocked by Crim.

After his escape, Tsukasa disappears.

Mimiru realises that she should give up on him, but an adventure with a character called simply A-20 makes her rethink that decision. As the others discuss Tsukasa, they all begin to agree that perhaps the legendary item called the Key of the Twilight is behind these strange happenings.

But there is doubt if it even exists.

BT and Crim form a secret partnership to investigate.

Tsukasa, meanwhile, cares for another players Grunty and learns something about responsibility in The World. And all along, the mysterious entity that gave Tsukasa his power says that things are all going according to plan...