Urotsukidōji: Legend of the Overfiend (1987)

When Mafuyu Oribe and her adopted sister Tomo rescue a strange wounded man, they have no idea what they’re getting involved with or what the consequences will be. Alexander Nikolaevith Hell is an Iron Qwaser, one of many opposing factions of super-warriors.

The Summer of "Anu": In a summer once every five years, demons in the mysterious Tower of Druaga lose their powers due to the magic spell cast by a god named "Anu". King Gilgamesh, ruler of the kingdom Uruk, uses the appearance of demons as an excuse to invade the tower and find out the construct's secrets. As 80 years passed, the Uruk army managed to fight back the demons and built a fortress city and safe haven on the very first floor of Druaga—Metz Kier. Thus begins the story of a warrior named Jil, who, finding companions along the way, embarks on a quest for the fabled Blue Crystal Rod, a powerful artifact rumored to be in the highest floor of Druaga. However, other competitors, including the kingdom of Uruk itself, want the treasure, all for their own reasons.

Junior high school student Miaka lives a normal life in Tokyo until she finds a mysterious book in the library, and she and her friend Yui are transported the Universe of the Four Gods. Upon arriving in this new universe, the girls are immediately attacked by would-be slavers and saved by a dashing young man. When Miaka isn't looking, both Tamahome and Yui vanish. Unbeknownst to Miaka, Yui has been sucked back into the real world. Back in the library, all she can do is read on as Miaka sets out for the city to find the mysterious young boy and save her friend. But what awaits for Miaka isn't what either of the girls expect—and now Miaka's only way back to her world is to become the Priestess of Suzaku and save their world.

It's the year of destiny and 15 year old Kamui Shirō, a powerful psychic, has returned to Toyko after a 6 year absence. He returns to protect his childhood friends, Fūma, and Fūma's younger sister, Kotori. But destiny and fate are haunting Kamui and pulling in himself and his loved ones. It is his destiny to decide the fate of the world and mankind, no matter if he wants the role or not.

Humanity was driven off the land by the threat of magical armored insects and now live in aerial floating cities. Its defenses lie in wizards who fight the insects with magic in mid-air. Kanata Age is a young man who lives on the floating wizard academy city of "Misutogan." He was once celebrated as the "Black Master Swordsman," the elite ace of the S128 special team. However, he is now despised as the "traitor of the special team." One day, he is assigned as the instructor of E601, a team that has suffered 10 consecutive defeats. E601 has three girls — Misora Whitale, Lecty Eisenach, and Rico Flamel — with one or two peculiar quirks.

High schooler Yūta Iridatsu has experienced “astral projection” i.e. his spirit has been separated from his body. He woke up in a mansion named Koraikan and met a cat spirit named Chiranosuke, who told him “You must find the Sacred Tome of Koraikan in order to return to your physical body.” While searching through corridors of Koraikan, Yūta bumped into underpants of its female residents, and doing so would, eh, create some big trouble for planet Earth.

Prince Wein is ready to commit treason. And who can blame him? Faced with the impossible task of ruling his pathetic little kingdom, this poor guy just can't catch a break! But with his brilliant idea of auctioning off his country, this lazy prince should be able to retire once and for all. Or that was the plan...until his treasonous schemes lead to disastrous consequences-namely, accidental victories and the favor of his people!

Kojiro Shindo is a highly-skilled negotiator working for the Ministry of Foreign Affairs. As his plane at Haneda airport prepares to take off, a huge mysterious cube appears from the sky. 'It' expands rapidly, and absorbs the passenger plane and its 252 passengers. The cube's name is "Kado." A strange being called Yaha-kui zaShunina appears from within Kado and tries to make contact with humanity. Shindo, who was been absorbed by Kado, ends up taking on the role of mediator between Yaha-kui zaShunina and humanity. Who is Yaha-kui zaShunina? What does he want?

Creatures known as Shokujinki have been secretly living alongside humans for hundreds of years. Though they may look like humans, Shokujinki are able to transform into uncontrollable beasts with gigantic claws and consume humans to survive. The equally secretive Kifuuken dojo specializes in killing Shokujinki by cutting off their arms, and is the only force preventing unchecked Shokujinki domination. Toshihiko Momota, the son of the leader of the Kifuuken, is instantly charmed by a mysterious woman named Yuka Kamitsuki. Their relationship is complicated, however, because unbeknownst to them both, Yuka is a Shokujinki and Toshihiko is sworn to kill her. Meanwhile, the Kifuuken is having a crisis of confidence as Toshihiko's brother Kazuma pushes against tradition and tries to modernize the Kifuuken. As emotions are strained and the secrets of both the past and present are revealed, who will live, and who will be eaten?

Three years ago, the world learned that harpies, centaurs, catgirls, and all manners of fabulous creatures are not merely fiction; they are flesh and blood - not to mention scale, feather, horn, and fang. Thanks to the "Cultural Exchange Between Species Act," these once-mythical creatures have assimilated into society, or at least, they're trying. When a hapless human teenager named Kurusu Kimihito is inducted as a "volunteer" into the government exchange program, his world is turned upside down. A snake-like lamia named Miia comes to live with him, and it is Kurusu's job to take care of her and make sure she integrates into his everyday life.