Inshoku-ō Demāru / Demar, lord of depraved tentacles

Rosalia is a beautiful adventurer who once hunted demons alongside other heroes. After retiring, she became the manager of an orphanage in a remote area, living a quiet life and raising orphaned children. But one day she found a strange insect in the shelter... It was the half-dismembered body of Demar, the king of lust, a powerful enemy she had defeated during her adventuring career...