Ep 19. Tempest

Tsukasa, Subaru, and Mimiru make it to Net Slum in search of information about the Key of the Twilight. Upon their arrival, they meet a young girl named Kamui who is seeking revenge against the Crimson Knights for destroying her village. Kamui joins their party and leads them to a hidden dungeon where they encounter a powerful monster guarding a treasure chest.

Just as they defeat the monster and open the chest, they are confronted by the Crimson Knights who demand they hand over the treasure. Kamui challenges the Knights to a duel and is easily defeated, leaving the rest of the group vulnerable to attack. As the battle rages on, Tsukasa is forced to confront the dark side of his power and risks losing control.

Meanwhile, Bear and BT are desperately trying to track down Tsukasa and the others, fearing they may be in danger. They enlist the help of a hacker named Helba who provides them with information about the location of Net Slum. However, they soon discover that they are not the only ones searching for Tsukasa and the Key of the Twilight.

As the episode comes to a close, the group is left battered and exhausted after their battle with the Crimson Knights. Tsukasa is especially shaken by the experience and begins to question whether or not he should continue playing The World. The episode ends on a cliffhanger as the group realizes that they must continue their search for the Key of the Twilight, despite the dangers that lie ahead.