Indulgence (Saha) summary: The abandoned princess wanted to destroy the imperial family. So, on a cold winter night, Estelle woke up the blue-eyed demon who was sleeping in the ice castle. "Make me empress." Surrounded by pure white snow, ice, and the thick scent of flowers, the beautiful demon whispered as she accepted the contract. "Welcome to hell, Estelle." Estelle thought that night was her first encounter with the demon, but they had an old first contract that Estelle could not remember... "The year you come of age. The night of the full moon in midwinter. The day the closed door of the ice castle opens. Promise me that you will call me then."