Jujutsu Kaisen 0

Okkotsu Yuuta is a nervous high school student suffering from a serious problem—his childhood love Rika has turned into a curse and won't leave him alone. Since Rika's no ordinary curse, his plight is noticed by Gojou Satoru, a teacher at Jujutsu Technical School, a school where fledgling exorcists learn how to combat curses. Gojou convinces Yuuta to enroll, but can he learn enough in time to confront the curse that haunts him? (Edited VIZ)

The official predecessor miniseries to Gege Akutami's hit serialization, Jujutsu Kaisen!