A special included on the 7th DVD release, commonly known as "Episode 14". It features nudity and adult situations which were not present in the original series.

The ancient Shenzhou Mainland, the ancient Chinese dynasty, and the demon kingdom of Tushan had been in conflict for thousands of years. Zhang Kuangyun from China and Bai Binglan, Princess Tianhu from Tushan, met each other because of a misunderstanding. To explore the details of the enemy, Bai Binglan lurked to Zhang Kuangyun’s side and became her follower. While identity gaps, differences in ideas, and emotional growth, with step-by-step exploration, Zhang Kuangyun slowly discovered that his aunt and teacher’s family were slaughtered and killed in the mountains only incidents that were covered up. An unprecedented great conspiracy gradually emerged from the surface.

Tie-in anime linked to the "Idol Land PriPara" smartphone game.

When Fujiko acquires and memorizes papers called the Columbus Files, she is attacked and loses her memory. Lupin, a treasure hunter named Rosaria, and the cackling villain Nazaroff all pursue Fujiko, as she is the only key to the location of Columbus' Egg, a treasure connected to the mysterious Orgone Energy. 

(Source: ANN)