The devilish Puniru-chan is a top-class succubus that rules over the succubi of the demon realms. Due to her overwhelming popularity, she is the envy of her succubi peers. However, cocky and arrogant, she has unwittingly made many an enemy... and thus her own downfall. She is setup by one such foe and invited to a fake banquet where she is assailed by a tentacle monster. Violated until she loses consciousness, Puniru is then taken to a dungeon cell. There she undergoes further sexual discipline at the slimy appendages of a heinous tentacle monster. Her body is gradually sexually developed and...