Dungeon Builder: The Demon King's Labyrinth is a Modern City! Volume 7 features story by Rui Tsukiyo and art by Hideaki Yoshikawa.

Procel has charged full-speed into his plan to save Marco, not only from the attack on her dungeon, but from her own fate. The Demon Lord of Creation is prepared to make sacrifices, big and small, even if it means he loses the respect of Marco herself. It’s an emotional plea from Procel that shifts fate and begins to build a new future.