This is the Prequel story to Jujutsu Kaisen, about Okkotsu Yuuta. There's gonna be made a movie for this, I'm looking forward to watching it :)
SPOILER WARNING!
Okkotsu is cursed with his dead fiancé from childhood. Rika-Chan aka “Queen of curses” protects him and well injured other people, Okkotsu decides that it’s best that he either dies or isolated him from everyone else. Instead he ends up training in the Jujutsu High school together with Zenin Maki, Panda and Inumaki Toge.
At the end he manages to dispel his curse and let Rika go :)
Tokyo Metropolitan Magic Technical School