If you are looking for a manga specifically about nuns with secrets, you might be thinking of: Shikkaku Seijo no Gekokujou
The series explores the idea that is possible, but it requires facing the consequences of one's actions. In the emotional finale, Sophia chooses to follow her heart, leaving the convent with the blessing of her sisters to rebuild a life with Alex in their home village. Other Notable "Nun" Media the nun 39-s secret manga
What is the plot of "Our Secret Marriage" manhwa? - Facebook If you are looking for a manga specifically
—creatures born from discarded myths and forgotten lies that slip into the real world through people's doubts. The Plot Points The Forbidden Library: Sophia chooses to follow her heart
Often the primary antagonist or a complex anti-hero who holds the keys to the mystery.