[Crossover] A Retired Onmyoji's Journey Through Humanity

The former big boss of the Yin-Yang Bureau, the Yata no Kagami, packed up and eloped with the Kusanagi Sword, leaving behind a gang of old Abe clan members eyeing the Bureau greedily. Abe no Seimei: I was the first to establish the Yin-Yang Bureau. --Sorry, the enemy plays dirty. We simply can't compete. Great Tengu of Sutoku: I've never met anyone in my entire life who was as damn shameless as my own mother. The chief onmyoji, a former subordinate of Yata, was also honorably forced into (behind-the-scenes) retirement. Unfortunately, his plans to travel and unwind after retiring fell through. He was tricked by a flyer into becoming a Master for Humanity. Fujiwara Mao, retired onmyoji: What now? I just want to live a quiet, lazy life. World, can't you leave me alone?! The one consolation was that two other people survived the selection in the end, making them a double act of Chaotic Evil. Why go to the front lines? Isn't the right way for the third Master to stay behind the two Chaotic Evils and handle support and logistics? Gudako: Before that, Senior Mao, can you explain the teleportation pod door you kicked until it broke, and your impressive feat of making me catch a bomb with my face? Mao: Ahem. ← Former number one tough guy of the onmyoji world You know, being chosen by the World Tree and bound by a pact with the Shield of the World, how is that my fault? ☆ Friendly reminder: The main story is based on Fate/GO and Aya. Treat the other things popping up all over the place as easter eggs. Thanks! ☆ One more reminder: There are tons of references and jokes. If you don't get most of them, they're probably references, lol. ☆ Pairings: Mao x Eisuke (Aya's official pairing, no breaking them up); Gudao x Mash (following the special episode); Gudako x Roman (if the male lead changes, blame the official story for being too sweet).