The Seven Princes of the Thousand Year Labyrinth volume 4 features story by Aikawa Yu and art by Atori Haruno.

Deep within the Castle of the Thousand-Year Labyrinth, Othello presses Ewan to make a fateful decision. As blood flows, Ewan must choose between giving up his own life—or everyone else's. Escape is almost within reach, but what must they sacrifice to make it a reality? The group's hard-won trust is put to the test in the final volume of this labyrinthine fantasy tale!