The endurance of "nun secrets" as a trope in manga (from Chrno Crusade to Uzumaki’s haunted chapel chapter) taps into universal fears:
: The story explores the contrast between outward "saintliness" and the "unholy" power she must use to survive, challenging the rigid moral structures of her society. 2. The NUN Secret (Web Novel/Adaptation)
: At the convent, Sister Sophia becomes beloved for her kindness and dedication to work and prayer, finding a sense of peace in her new role.