The Millennial Dream - Melancholic Misanthrope.While Benio recuperates from her injuries, Arima reveals to Seigen that during his fight with Kuranashi, he triggered a special spell that separated his body and soul temporarily, allowing him to witness events from the past. In the occasion, he discovered that Abe no Seimei created Magano as a place to banish humanity's residual Yin energy to, but its accumulation gave birth to stronger impurities, like the Basara, later establishing the Twelve Guardians and founding the Exorcist Union to deal with them...