666 Ways to Conquer the Demon King

【Another Story】 A story of "what if" that might have been
Rebuilding the main story of the previous work 『Three Ways to Conquer the World』!
With the theme of "What if there had been such an option at that time!?", even characters other than Rusty get gender-swapped!!
【After Story】 Post-ending side stories
A short story collection depicting the "after" stories of being united with each character from the previous work 『Three Ways to Conquer the World』!
You can enjoy sweet and loving newlywed and lover lives. New characters also appear, such as the hero's self-proclaimed fiancée, the demon lord's master, and even the demon lord and hero as children!
■ Klaus・After Story 『The Fake Fiancée Chapter』
A few days after the super hide-and-seek. Klaus's injuries are almost healed, and it seems peace has returned to their daily lives.
However, at that moment, "self-proclaimed hero's fiancée" Elrione appears. Faced with this unexpected enemy, what will Rusty do...
■ Klaus・After Story 『The Newlywed Life Chapter』
Not long after getting married, Ras storms back to her parents' home (the Demon Lord's Castle) in a rage.
When Liz eagerly asks, "Did you two fight already?", Ras begins to describe just how perverted Klaus is...
■ Cecilia・After Story 『The First Part-Time Job Chapter』
Lately, Cecilia seems to be acting a bit strange...
Ras becomes suspicious of Cecilia, who goes out every day and keeps something hidden.
One day, Ras decides to follow her, and discovers that Cecilia is working part-time as a waitress...
■ Lucart・After Story 『The Butler and Maid Chapter』
Rusty, Lucart, and Liza are playing a boring game.
The loser must obey the winner's orders, and Ras is forced to dress as a maid while Lucart is forced to dress as a butler.
The tyrannical king Liza, who gives whatever orders she pleases, finally gives the two a certain command.
■ Liza・After Story 『The Virtuous Wife Chapter』
A perfect match of super S and M, Liz and Ras's relationship is progressing fairly smoothly.
However, after reading a certain magazine, Liz feels that maybe things can't go on like this.
So, starting the next day, she works hard to become a cute girl...
■ Fortina・After Story 『The Puppy Chapter』
Rusty has used up the lamp spirit's wishes.
While researching other ways to turn back into a man, for some reason Fortina suddenly grows dog ears and a tail!
She herself doesn't seem to mind much, but as usual, her heat cycle arrives...
■ Three-Way Battle・After Story
Klaus and Lucart are having pointless arguments every day.
Ras sighs, thinking that at the end of the day, they're just sulking at each other.
Just then, Ras encounters a traveler who is the man among men...
—And so on, a total of over 10 stories are included!