Yu Yu Hakusho (1992)

In the Kanto region of Japan, seven high schools take place in a turf war for territorial supremacy: Nanyo Academy, Kyosho Academy, Seito Academy, Yoshu Academy, Rakuyo High School, Gogun High School, and Yoshu Private School. The fighters of each school bear the sacred jewels called magatama, which contains the essence of warriors from the Three Kingdoms era of Ancient China 1800 years ago, as well as their fates.

To be united with her crush, a hopeless romantic summons the ghost in the girls' bathroom at her school. But she's shocked when the ghost is a boy!

A door to another world stretches out before a boy who's been brutally bullied all his life. This alternate reality grants him access to all sorts of things, like cheat skills and a portal that lets him travel between his old and new worlds! Can this class loser turn his life around back home...?

The spirit Hanako-kun and his human assistant, first-year student Nene Yashiro, keep the peace between supernatural forces and the students of Kamome Academy. When they’re not fighting to maintain balance between the living and spirit worlds, how do they spend their time? Join Hanako-kun and Nene on their adventures after school!

Kiyotaka Ayanokouji enrolls at the prestigious Tokyo Koudo Ikusei Academy, but is assigned to Class 1-D, where students with behavioral problems are housed. The school awards points equivalent to 100,000 yen per month and allows unusual freedom in classes, masking a more complex system.

In a bet to prove whether ghosts or aliens exist, two high schoolers face terrifying paranormal threats, gain superpowers and maybe even fall in love?!

In a world where magic is not a fairy tale but has existed for one hundred years siblings Tatsuya and Miyuki Shiba prepare to begin their studies at the elite Private Magic University Affiliated High School (Magic High School for short). Entering on different levels of the academic spectrum the two turn the once peaceful campus into a chaotic one.

This is a world of magic where magic is used for everything. But deep in the forest exists a young man who spends his time training and bulking up. He can't use magic, but he enjoys a peaceful life with his father. But one day, his life is put in danger! Will his muscular body protect him from the magic users who are out to get him? Powerfully trained muscles crush magic as this abnormal magical fantasy begins!

Rather than take a more sensible approach to salvaging his grades in time for graduation, Alto summons a bit of otherworldly help. Only after does he learn he’s bound the legendary she-devil Vermeil into service as his familiar!

Jin Mori has proclaimed himself the strongest high schooler. His life changes when he's invited to participate in "God of High School," a tournament to determine the strongest high schooler of all. He's told that if he wins, any wish he makes will be granted... All the participants are powerful contenders who fight their hardest for their own wishes. What awaits them at the end of the tournament? A chaotic battle between unbelievably strong high school students is about to begin!