Season 1
Akira Oono is an ordinary working adult who manages the MMORPG Infinity Game. Fifteen years after creating the game, Oono decides to shut the servers down once and for all. However, as the clock strikes midnight, he somehow finds himself in the body of middle-aged Hakuto Kunai, Infinity Game's Demon Lord! Soon after his mysterious transportation, he witnesses the demon Greole chasing after a little girl named Aku. Although he effortlessly dispatches the creature, Hakuto is still concerned; after all, he does not remember creating the girl or the demon! Doubting whether he truly is in the world of his creation, Hakuto decides to investigate. Bringing Aku along as his guide and companion, Hakuto sets out on a journey to find out exactly who or what summoned him to this fantasy world—all while leaving chaos and destruction in his wake.
Demon Lord's Descent
Akira Onno ends up in another world of his own creation where he runs into a filthy girl shunned from her village who ends up calling him Demon Lord.
Golden Luna
When one of the three Holy Maidens comes to dispatch the Demon Lord, Kunai is forced to resort to some old-fashioned discipline.
Killer Queen
Luna's wild sister comes to take her away. But when trouble shows up to ruin everything, a new face comes to save the day.
Yu Kirino
Kunai summons one of his underlings who lends Aku a helping hand. But being who it is, they may end up being more than he can handle.
Merciless Invasion
On their way to the Holy Capital, the party runs into a small village with big problems and decides to take matters into their own hands.
Turmoil in the Capital
While having a pleasant dinner banquet for Aku in the Holy Capital, the celebration is cut short by a dangerous cult with a thirst for blood.
All or Nothing
As the Holy Castle comes under attack, the defenders get in over their heads. Kunai opts to send his replacement to take on the troublesome Demon.
Demon Lord's Handiwork
After investigating the Seraph in the Holy Capital, Kunai and crew jump back to Rabby Village to get his money-making scheme underway.
Dancing Swindler and the Giant Gold Coin
In order to prepare the hot spring resort for business, Kunai earns some much-needed funds by taking advantage of a merchant who doesn't know any better.
Madam Roars
Luna tries to impress Madam Shrimpfry with a tour of the hot spring resort. Later on, Aku, Luna, Yu, and Tron all compete for Kunai's attention.
Yukikaze Attacks
Kunai falls victim to Yukikaze's attack while on the hunt for information. Meanwhile, Angel takes it upon herself to rescue her little sister.
White Angel and Demon Lord
During a surprise confrontation in the outdoor bath, Angel White finds out Kunai may be more than meets the eye.