Jujutsu Kaisen › Season 1

Chapter 1 — Ryomen Sukuna

Yuji Itadori is a high school student with incredible athleticism and sports talent. Yuji's grandfather tells him to use his strength to help others just before his death. Megumi Fushiguro, a student from Tokyo Metropolitan Magic Technical College, is tasked with searching for a "Cursed Object", a finger of Ryomen Sukuna, a powerful supernatural monster known as a "Curse". Megumi tracks Yuji down, having sensed the finger's energy from him. As Curses attack them and Yuji's friends, Megumi fights back and Yuji, recalling his grandfather's last words, joins him. As Megumi is overwhelmed, Yuji eats the finger in an attempt to save Megumi and his friends. This causes him to be possessed by the murderous Sukuna. Yuji easily suppresses Sukuna but Megumi declares that he has become a Curse and prepares to exorcise him. (Source: Wikipedia)