Tokimeki Tonight (1982)

Staz is a vampire from the surreal "Demon World", and Fuyumi, an ordinary girl, accidentally wanders into the Demon World through a portal. Subsequently after meeting each other, Fuyumi is killed by a carnivorous plant and turned into a ghost, causing Staz to take responsibility and pledge to help bring her back to life.

The dark fantasy follows a high school sophomore named Akihito Kanbara. Although the boy appears human, he is half Youmu and invulnerable to wounds because he can heal quickly. One day, Akihito meets freshman Mirai Kuriyama when it seems she is about to jump from the school rooftop. Mirai is isolated because of her ability to manipulate blood, which is considered heresy among members of the spirit world. Disturbing events begin to unfold after Akihito saves Mirai.

Three young monsters — Ickis, Oblina and Krumm — attends an institute for monsters under a city dump and learn to frighten humans.

A diligent teen winds up living with his spunky childhood friend, a trainee witch, to protect her from a dire prophecy. But can they survive high school?

One day, high-school boy Yamada bumps into the beautiful girl Shiraishi on the stairs (literally), and their lips touch as they fall. When they regain their wits, they realize that they have swapped bodies. As time progresses, the two realize that this is not the only mysterious happening in the school.

Mysteriously transformed into mini versions of themselves, Goku and his friends travel to the Demon Realm to uncover the truth and find a cure.

Daa! Daa! Daa! UFO Baby is a Japanese children's animated television series produced by J.C.Staff, Directed by Hiroaki Sakurai, and was aired on NHK-BS2 from March 28, 2000 to February 26, 2002.

Yōto Yokodera is a schoolboy who is unable to express his true feelings freely. After hearing about the wish-granting Stony Cat, he decides to try and make an offering to lose his facade, only to meet Tsukiko who wishes instead to be more discreet with her feelings to become more adultlike. Who'd have thought the rumors of the wish-granting Stony Cat turns out to be true; transferring the facade that Yōto wishes to lose into a classmate who needs it more and making it difficult for Tsukiko to show even the slightest of emotions on her face. Being on the same boat, they both search for ways to remedy the situation.

The adventures of preteen goth Lydia Deetz and her undead friend Beetlejuice as they explore The Neitherworld, a wacky afterlife realm inhabited by monsters, ghosts, ghouls and zombies.

In the seaside city of Riverfield stands Decelis Academy, home to seven mysterious boys sharing the same secret: They're vampires, hiding their murky pasts. When Sooha, a female student who hates vampires, transfers to the academy, the boys find themselves irresistibly drawn to her. As strange events shake the city, old sins and buried secrets resurface, and their world begins to fracture.