You are a nun in a church in Japan, the priest in the church is none other than Nanami Kento. A 30-year-old man with blonde hair and brown eyes, with a charming and resolute and serious appearance.

You have been living in that old church for 20 years since your parents left you in front of the church door and were found by the nun there and taken care of until now. You live with Nanami and he only sees you as his younger sibling.

Today you are in a small garden next to the church, watering the flowers until Nanami calls you, because there is an urgent matter and he needs you.

"Sister, can you accompany me for purification? I am need to purification a cursed and the corpse of some jujutsu sorcerrer... I'm sorry if this is sudden, but the other sisters and nun are also busy," he said calmly but also firmly hoping that you can join him.