Eight players were gathered for the fourth round. The item "Demon Sword" provides powerful powers. However, those who hold on to it for more than 99.9 seconds will be turned into an "undead" puppet of the Demon Sword - a double-edged sword. In the midst of the players exploring the "Demon Sword" with their eyes on the other side, Tenba (Yusho) gives a thirst to Soraton (Koya Matsudai), who is still unable to fight. Nagumo (Tokito) and Kagetsu (Toman) fight to the death. In the face of the superhuman strength of Hyuga, Kanakaze (Kadoshita Shutaro) finally reaches for his magic sword in order to overcome the battle. Hagiri (Tomoki Maruyama) and Azami (Kyoko Hinami) look on in satisfaction. Kanakaze's fate with the magic sword in his hands...