Akuma-kun (1989)

"This is a tale that took place long ago. There once lived an old man and an old woman. The old man went into the woods to cut down some grass and the old woman went to the river to... (You know the rest.) The ogres had finally been defeated, but apparently, there were more ogres living elsewhere, so Peach Boy crossed the sea... It was an amazing feat to defeat the ogres and a joyous feat that Peach Boy saved many lives. But the one thing that went wrong... Was that they had fun. This is nothing more than a "What if"... What if there was more than one peach that tumbled down the river?

Toujou Basara is a high school student whose father has suddenly just remarried. His father then departs overseas leaving Basara with two new beautiful step-sisters. Little does he know, his new sisters, Mio and Maria are actually the new Demon Lord and a succubus!? Almost trapped into a life of servitude, Basara forms a reverse contract by accident and ends up becoming Mio's master! Hijinks ensue as Basara finds himself in one ecchi situation after another. However, Mio's life is in danger as she is pursued by demons and heroes!

Two thousand years ago, the black-and-silver-winged dragon, Bahamut, terrorized the magical land of Mistarcia. The humans, god, and demons that inhabited the land united forces against the fiend and sealed its power into a key which was split in two, one half protected by gods and the other protected by demons. Now, Mistarcia is a peaceful realm – until a human woman steals the god’s half of the key. Based on the immensely popular digital card game, Rage of Bahamut: Genesis is an exciting blend of action and fantasy.

For 30 years, thousands have traveled to other worlds. The few that return keep the powers they had in those worlds. Akatsuki Ousawa returns from the world of Alayzard with the defeated Demon King's daughter, Miu. Miu pretends to be Akatsuki's sister to hide her true identity. They join Babel, a school for inter-dimensional travelers, and struggle against the student council to uncover the truth behind the school.

When nearby construction disturbs a spiritual resting place, its disgruntled denizens do what any supernatural beings would do after a rude awakening: they terrorize the local school. And that means it’s up to a scruffy band of young ghostbusters to expel their satanic schoolmates before everyone gets sent to permanent detention! So join Satsuki, her crybaby brother, the resident class stud, the school nerd and "physical researcher," a born-again beauty, and a resentful, demon-possessed cat in the funniest, scariest school you’ve ever enrolled in.

Rokuro is from a family of exorcists, but he'd rather be a singer, a soccer player or anything but an exorcist! He's forced to own up to his own incredible potential when new arrival Benio stirs his competitive spirit. But their rivalry gets a twist when they earn the prestigious title of "Twin Star Exorcists"—two supreme fighters fated to marry and birth the ultimate spiritual warrior!

On the brink between Heaven and Hell lies the town of Daten City, where sinister spirits known as "Ghosts" feast upon humanity.

Zagan might be the most feared evil sorcerer, but when it comes to social interactions, he's the most inept. All those days studying the dark arts won't help him when he falls in love at first sight with Nephelia, the beautiful elven slave, and spends his entire fortune to purchase her. With no clue how to talk to each other, the awkward arrangement for a bumbling sorcerer and timid elf begins.

After dying to save a boy, delinquent tough guy Yusuke Urameshi is granted another chance at life by redeeming himself as a "Spirit Detective."

Nakajima Youko is your average somewhat timid high school student. One day, a strange man named Keiki appears before her, swearing allegiance. Before she could properly register what was happening, demon-like creatures attack Youko and her friends, after which they are pulled into a different world. A world unlike what she has ever known. Separated from Keiki, Youko and her friends must do whatever they can if they wish to survive in this new world.