The Adventures of Kotetsu (1996)

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!

Jotaro Kujo is a popular high school student – at least until that day when he thinks he is possessed by a ghost, which is why he locks himself up. During a fight between his grandfather and his grandfather’s friend Muhammad Abdul, he notices that the ghost is his “Stand”, named "Star Platinium", his fighting aura. Later, his mother also gets such a “Stand” and thus falls ill. Jotaro learns that a man named Dio Brando, who was defeated by Jotaro’s great-great-grandfather a hundred years ago, is to blame. He joins his grandfather and Abdul to destroy Dio once and for all.

Amnesiac Caiman seeks to undo his lizard head curse by killing the sorcerer responsible, with his friend Nikaido's help. In the Hole, that's a threat.

Asahi, a boy who loves video games is killed in a traffic accident and ends up in another world. He tries to enjoy the otherworldly adventuring life he's always dreamed of, but his stats are on the level of an NPC's. He is in big trouble and is being chased by a monster when he hears, "Fear not, little brother!" and the monster is killed in one hit by Asahi's older sister, Maya, who followed Asahi to this world. So Maya has acquired some seriously OP skills, but she takes her adoration of her younger brother to extremes. Thus begins their story about an overpowered older sister with a brother complex and a younger brother with the weakest of stats in another world.

In a world where Skill Fruits grant powers, aspiring adventurer Light is stuck with the useless «Fruitmaster» skill. Eating another one results in death, so no do-overs. Meanwhile, his childhood friend Rena quickly rises to S Rank. But when Light accidentally eats a second Skill Fruit, he survives and discovers his true power: He can consume unlimited Skill Fruits and gain their abilities!

Bayron City -- a Mega-Float type city in the Pacific Ocean, which doesn't belong to any particular nation. As the mine for Orgonium, a new energy resource, this city is the most noticed in the world right now, and here special cases caused by demons called "D Hazards" has been occurring frequently. Only a handful of people know about the existence of D Hazards. They are handled by PMCs (Private Military Companies). Shu is a young man living in Bayron City who runs such a company, but his company is tiny. On top of that, he cherry-picks his jobs, so he is always in a bind for money. His life, both publicly and privately, is being supported by the beautiful high school girl Kisara who attends a school in Bayron City.

Hida Kizuna possesses the HHG (Heart Hybrid Gear) ability, but it is not strong enough to make him particularly important. His older sister calls him to transfer to a strategic defense school, where many of the students (many of which are large-breasted girls) use their HHG abilities to fight invaders from another world while wearing extremely skimpy pilot outfits. Kizuna's fighting ability doesn't measure up, but his sister has another plan—apparently having erotic experiences with Kizuna will allow the girls to replenish their energy or power-up. It looks like his new school life is going to be full of embarrassment.

Demon King Daimao follows Akuto Sai as the lead character, who on the day he enters Constant Magic Academy, receives a very unexpected future occupation aptitude test result: “Demon King.”

The story follows Justice Akazuka (a.k.a. Seigi), a young man who is good at martial arts. One day, Seigi rescues a homeless old man from some thugs, and the man gives him an object that imprints a tattoo on his palm. However, it is not an ordinary tattoo, but a special weapon that gives Seigi supernatural powers such as warping space-time. Seigi then meets a female American agent named Izzie, whose duty is to recover the tattoos. He decides to help her and gets wrapped up in a cross-national conspiracy.

In the decade since the world became aware of the existence of magic, the world has undergone massive upheaval. However, a boy named Tōta lives in seclusion in a rural town far removed from these changes. His ordinary life is highlighted by his magic-using female teacher and his supportive friends.