Succubus x Saint

Liruna grew up inside the church and has spent her life in training to become a saint. When her father dies, the role she worked toward is given to a fellow trainee instead, and Liruna is assigned to participate in a different ritual entirely. The ritual goes badly. A curse lands on Liruna, a meddlesome succubus escapes her seal, and an army of monsters that have been contained for centuries pours out alongside her. Church members are kidnapped and scattered across the world. Liruna now has to find the four Sealing Orbs before the curse the succubus placed on her finishes what it started — and put the monsters back where they came from before more damage is done.