The Mingyue Society was an organization co-founded by Chen Yu, who had tasked Tsuchimikado Yoshiharu and Kyuuzai Ryousen with its creation, embracing both transcendents and the elite.
However, although Chen Yu had delegated this task to Tsuchimikado Yoshiharu and Kyuuzai Ryousen, he had not been particularly interested in the matter. The benefit he had originally planned to provide to the members of the Mingyue Society, which would allow them to cultivate in the Necromantic Space, was now at risk of being abolished by Chen Yu himself, as he had successfully proposed to Jounouchi Hiromi and wanted to turn the Necromantic Space into a private garden.
Now that Kyuuzai Ryousen suddenly informed him that the Mingyue Society was not only established but also preparing to convene a meeting, and asked if he wished to attend that evening, Chen Yu couldn't help feeling somewhat taken aback.