The Cursed Lesson

Online fashion model Hyo Jeong faces unemployment as a new, trendier generation emerges. Desperate to maintain her looks, she stumbles upon a mysterious yoga class recommended by her high school classmate, Ga Yeong. Hyo Jeong convinces three classmates, including a failed boxer, a mentally unstable woman, and an obsessed movie star, to join her. However, as police investigate a murder linked to the yoga class, the enigmatic secrets behind it begin to unravel, posing a grave threat.

(Source: MyDramaList)