Takuto and his friends are still trapped inside the sandbox-style game Cube Arts, but they haven't given up on escaping. They've devised a daring plan to rescue their friend, Noa, along with countless other players who've been kidnapped by a ruthless gang terrorizing the world. New enemies and old secrets are revealed in this thrilling final volume!

High school first-year Takuto has been selected as a beta tester for the new sandbox-style video game Cube Arts, and he couldn't be happier. As soon as he puts on the game's VR headset, Takuto finds himself immersed in a sprawling world made entirely of blocks, where he can mine, build, and hunt to his heart's content. But when a logout error traps him and his friends inside the game, Takuto discovers that even sandboxes can be deadly!

Takuto, trapped in a sandbox-style video game, must save his friend Noa from slavery. So he crafts the Iron Greatsword, a powerful weapon made of diamonds. Meanwhile, the truth behind the Soul Stones that drop when a player is killed begins to emerge. Minecarts, monsters, mayhem...in this cubed world, the possibilities for fun--and death--are endless!