LLENN and her comrades head to the center of the island, where they find the luxury cruise ship. As the island continues to sink, they must get on board. However, they can't carelessly approach the vessel as BTRY awaits them onboard.

The organizing team of the game announced a shocking, special rule to be implemented. One "betrayer" will be selected from the six remaining teams to form a new team. Pitohui is selected from LPFM, and the team leader of SHINC, Eva, also joins. With this new rule implemented, Pitohui is happy that she can fight against LLENN. Eva gracefully leaves her team, hoping to fight against LLENN, too. All of the "betrayers" meet up on a luxury cruise ship set up in UNKNOWN, forming a most intimidating team named "BTRY"!

Clarence and Shirley defeat and destroy the allied team. KKHC is wiped out after the two kill each other in a fierce battle. Meanwhile, LPFM rides a truck inside a freight car and calmly heads over to UNKNOWN as if going through a deserted field.

LPFM managed to defeat many members of the allied enemy team, but the island continued to sink, drastically decreasing the physical space they could move around in. LLENN and her comrades avoid areas near the sea and whip up a plan to cut across the northeast section of the island where members of the allied team have gathered. Clarence joins the allied team at this time. She suggests splitting the team into smaller groups of two people and launching waves of attacks against LPFM. However, immediately after they launch this plan, she betrays her teammates and attacks them. In addition, Shirley, who left the KKHC to fight alone, begins joining in on the attacks against the allied team! 

SJ3 has finally begun. The battlefield is located on an island surrounded by the sea. The word "UNKNOWN" is written on a small hill in the middle of the island. "Is this 'UNKNOWN' the 'special rule' for this battle?"

Three months after LLENN won second place in the team battle, "Second Squad Jam" (SJ2), "Third Squad Jam" (SJ3), was announced. Soon after, news broke out that Pitohui, M, Fukaziroh, and LLENN formed "LPFM," considered the strongest team in the game. Clarence is obsessed with LLENN, and Shirley ignites her fighting spirit to kill Pitohui. All members of SHINC hope to take revenge as they lost to LLENN in SJ1. A heated battle surpassing SJ2 is about to begin…!