Once a beautiful adventurer named Rosaria who hunted demons alongside heroes. After retiring from the front lines, she ran an orphanage in a remote land, quietly raising orphaned children. However, one day, she found a single insect in the orphanage… It was a fragment of Demar, the King of Lewd Touch, an enemy she had failed to completely eliminate during her adventuring days. “Impossible… still searching for me…” Rosaria, alone, confronts the extending hand of revenge, but, countless tentacles assault her ripe body――!?