The second part of season one of Bing Zhu Qi Hun.

From time immemorial to the age of space colonization, there is one legend that has stayed unchanged in every history book—the tale of the immortal bird Phoenix. A being whose blood is said to grant eternal life or wisdom, the radiant figure ensures the continuation of sentient life in the universe as it oversees human civilizations and their development. Yet, mankind remains a slave to its habits; from happiness and sorrow, to wrath and love, a myriad of emotions continue to play an integral part of human life. Simultaneously, time and time again, certain beliefs and agendas persist over the centuries to disturb the fragile equilibrium of the world's preordained nature and principles. It appears that fate and its dynamic variables can manifest itself in many ways—and oftentimes exhibits a bizarre sense of humor...

The main characters, Himari Aozora and Mitsuki Hoshikawa, enter Paradise Private Academy. Himari, who aspires for AIPRI, dreams of making 10,000 friends! But for the shy and anxious Himari, it might be a bit difficult... Himari unexpectedly makes her AIPRI debut!? She has a "secret" she can't even tell her best friend, Mitsuki! But it seems that Mitsuki has a "secret" of her own... Secret-bearers Himari and Mitsuki's AIPRI begins!!

The fourth season of .