With the leaders of Holylight under his thumb, the Demon Lord decides to summon yet another member of the Sleepless Castle: Ren Miyaoji, Akira Ono’s most beloved advisor. After a brief reunion, they travel to Euritheis, where the mafia-owned company Jack of All Trades reigns with drugs, gambling, and human trafficking. The Demon Lord, the walking embodiment of hijinks, soon draws the attention of this company, and then...

After defeating the Grand Devil Belphegor, the Demon Lord returns from Hellion Territory to his home-away-from-home, the Village of Rabbi. There he summons yet another advisor, this time to handle the maintenance and management of the village. He had hoped to finally make space for some quality time with the friends he’s made in this world, but his well-deserved R&R is cut short when one of the four major political factions in Holylight sparks civil unrest.

While his trusty advisors work tirelessly to make the Village of Rabbi into a profitable and prosperous hot springs retreat, the Demon Lord dives deep into the Bastille Dungeon in search of something crucial he needs to protect himself in this world — a defense against magic. However, deep in the dungeon, a mysterious force awaits the Demon Lord... Hijinks and comedic misunderstandings ensue as the Demon Lord grows closer to the secret behind this fantasy world.

En route to Hellion territory in search of answers, the Demon Lord and company explore Animania and encounter its wild inhabitants. Meanwhile, Luna learns that her best friend is among a shipment of slaves being transported to Hellion territory by the powerful and theocratic Tzardom of Light. She rushes North to save her, where the Northern Nations are entangled in an age-old war.

What do you do when the MMO you’ve run for 15 years comes to an end? Akira Ono didn’t get much of a choice — he woke up trapped inside the world of his own game in the body of his in-game character: the Demon Lord. With an outcast child as his sidekick, he tries his best to survive the cruel fantasy world of his own creation, persecution from the good guys, and of course, the final boss.

What do you do when the MMO you’ve run for 15 years comes to an end? Akira Ono didn’t get much of a choice — he woke up trapped inside the world of his own game in the body of his in-game character: the Demon Lord. With an outcast child as his sidekick, he tries his best to survive the cruel fantasy world of his own creation, prosecution from the good guys, and of course, the final boss.

Having rescued Luna’s childhood friend, a demi-human named Eagle, from the Tzardom of the Light, the Demon Lord finally advances through Animania into Hellion territory, finding himself in a slave market. He launches a full-on war against the Hellions in order to free the enslaved humans. What will happen when the Grand Devil Belphegor, Olgan’s father, hears word of this? The Demon Lord plunges further into the turmoils of this fantasy world, as he continues to search for the truth behind this world and his place in it.

Hot Springs, Pumping (for Information), and New Allies. Once the Demon Lord things has things bubbling away at the Hot Springs Resort, it's time to get down to business. In a situation like this, that means adventuring, and what better partners than the sullen Mikan and thirsty Yukikaze? As the trio head north to the city of Rookie, home of the Bastille Dungeon, the Hellions and Anima are on the move in pursuit of their own motives, most likely to the detriment of the humans. Can the resort team stay safe in the Demon Lord's absence?

Having defeated the high-ranking devil Allit, the Demon Lord and company set off for Hellion territory, leaving chaos in their wake. There, Olgan’s father—the grand devil Belphegor—captures her. To save her from him once and for all, the Demon Lord storms into the grand devil’s sanctum!

Trapped in the body of his MMO’s Demon Lord, Akira continues his quest to find a way out of this fantasy world... and to build a hot spring resort!? Hilarious hijinks come to a halt when the Satanist cult attacks the capital of Holylight. In an attempt to keep a low profile, Akira switches characters, once again becoming Zero Kirisame: the bosozoku hero with a dragon on his back.