Transmigration is a very happy thing.

Becoming a Demon King is an even happier thing.

When two happy things come together, even becoming a girl should no longer be unacceptable—it should have been like this.

Leticia thought she would be like her transmigrator predecessors, defeating everyone under heaven and opening a grand crystal palace.

However, she encountered her lifelong nemesis, humanity’s Sword Saint.

“How can there be such a pe*verted person! Are you even going to let people live!”

Having her confidence dealt a devastating blow, Leticia shut herself away and ran to the human world to start slacking off.

But why is the Sword Saint here too?

I, Wang Luowei, traveled to the "healthy, sunny, and positive" world of Hengsan, and became the Herrscher of Corrosion that I hate the most! Never mind, since I am here, I'll make the best of it. My family, let's take a look at the world in the distance. Wait, where is this? Siberia in 2000?

The dynasty is in decline and the world is in chaos. Demons are rampant and people are suffering.

Gu Qing'an, who traveled to this world, had no time to appreciate her beauty before she had to face the demons that would devour her prey.

Fortunately, she had a cheat.

Ding! [Demon Hunting System Opened]

Kill the demons and gain demon hunting points to strengthen yourself.

"I, Gu Qing'an, have never been inferior to others in my life. System, add to me."

...

Many years later, Gu Qing'an, standing on the frozen void, looked expressionlessly at the newly discovered alien world under her feet.

She said to herself: "Compared to humans, the alien existence is the demon."

"Then, are all the creatures in this world considered demons?"

Boss asked.

(Anime crossover, light novel)

Thanks for the invitation. I'm in One Piece, and I start out as Black Hairless.

Wandering the seas, free and unrestrained, but—

Why is this eagle-eyed rascal chasing me around all day? What? My son offended you? Then go find Xiao Mo! Why are you bothering me?!

Garp, why are you chasing me every day? Huh? Where's Great Britain? Can't you find it yourselves? Inviting me to join the navy? Me, the King of Great Britain, are you kidding me? No way!

Redheads? Giving you face? Not getting involved in the summit? Giving a cripple the run for his money! Asking for a beating!

Huh? I'm not that Black Hairless guy! What does your looking for Black Hairless guy have to do with my Gundam? You've got the wrong person!

Having traveled through time and space, I've gained the ultimate Heroic Spirit Avatar Legion System. The future of sweeping the world with an endless army of clones is just around the corner!

But... why are there only female Heroic Spirits?

...

"Can you tell me how you managed to find so many loyal and beautiful wives?" Fujimaru Ritsuka asked, stunned.

"It's mainly because... we're all connected."

Surrounded by beautiful women, Bree looked away awkwardly.

(Note to those in the audience: The male protagonist can transform into various female Heroic Spirits and use Heroic Spirits as clones.)

Kasumigaoka Utaha: "Teacher Izumi, you are my woman, don't even think about running away!"

Kato Megumi: "Izumi-san is surrounded by so many beautiful girls. I'm a little unhappy~"

Yukinoshita Yukino: "Tell me the truth, do you like me or my sister?"

Yukinoshita Haruno: "As the eldest daughter of the Yukinoshita family and Yukino's sister, I shouldn't have such feelings, but I still want to tell you, Miss Qin Hai, I like you!"

Yuigahama Yui: "Izumi-san, do you think it's normal for a girl to like another girl? Actually, I'm... "

Isshi Iroha: "Senior~Senior~I am your little fan girl now, you must be responsible for me!"

Shiina Mashiro: "I suddenly realized that it's not just your paintings that I like. I also like you."

Sakurajima Mai: "What a cute little school girl that makes you want to love her."

The orange-colored aura is actually right next to me!!!"

I got seven gold cards in ten gacha pulls, then was struck by lightning and transported to the continent of Teyvat. When I woke up, I found myself transformed into Kiana! Although there's a system where you can get Primogems by completing achievements, there's a more important problem now...

Ying: "Is this photo of you?" (She takes out a photo of Tianli)

Kiana: "Is... no... this isn't me!"

Ying: "I think this is you!" (She pulls out a weapon to persuade people with reason)

Kiana: "Wait a minute! This really isn't me!"

Bai Li's soul traveled through another world, cultivating for three hundred years before becoming a witch under the deception of his teacher... Finally, with the help of the witch teacher, the witch named Bai Lili returned to Blue Star. Only three years had passed on Blue Star... Bai Lili was stunned. Her sister, whose spirit energy could be condensed into a vortex, her mother, whose breath could shatter rocks, and her father, Old Deng, could fly on a sword! "Three years after the resurgence of spiritual energy, you're already world-class?" Who can fill in the missing plot for "Return from Another World, Shocking Muggle Parents! Torturing the Genius Sister!" "No, no! Why am I not your son?" The three members of the Bai family gazed at the girl with dragon horns and a bladed tail swinging from side to side... "I can explain! I really am your son..." "Daughter!" From the first day back from another world. Uncovering the secrets of my origins, passing down a profound cultivation method...

After being blown away by a dump truck, Qian Yuan arrives at FGO's seventh singularity, the Absolute Demonic Front. What should he do if the world is about to end? Fortunately, his soul was replicated and scattered across the universe. Mei from Honkai Impact 3rd, Lei Yingying from Genshin Impact, Rin Tohsaka from Warcraft V, Shoko Toyokawa from MYGO, Ai Haibara from Detective Conan, W from Arknights, Illya from Makai, Athena from Godslayer... Qian Yuan can share power with his alternate selves and travel through the worlds, but why are all my other selves girls? My wife is actually me.

[Hundreds of Friends] + [1v1] + [Maid] + [Training] + [System]

When she woke up, she had become a beautiful silver-haired girl with a delicate and graceful figure.

Even worse, she was captured by Hera, the most brutal ice queen demon in the entire abyss, and taken back to the Demon King's castle to be his personal maid!

Just as I was preparing to fight to the death, the [God-Level Battle Maid Training System] descended from the sky!

[Task issued: Please kneel on one knee, put stockings on the Demon King, and compliment her on her perfect leg shape.]

[Mission Reward: Divine Skill - Absolute Parry (Can catch any attack with bare hands)]

I, Lilia, would rather die than jump from here...

[Punishment for mission failure: Physical development +200%, and a compulsive pleasurable response to the Demon King's touch]

"...Master, would you like to put on the left leg or the right leg first? Your legs are simply the most perfect masterpiece of the gods!"

From then on, the Queen of the Demon Realm had a uniquely styled personal maid.

During the day, she was clumsy and awkward, even spilling tea all over herself when she tried to pour a cup of red tea for the Demon King;

At night, she pierced the invading dragon with a mop and withstood the world-destroying curse with her apron.