Belphegor

* Based on Matoba's fantasy romantic comedy manga. Myurin's lands his dream job with the demon king he's always held in awe, but when his tenure begins, it turns out the demon king isn't quite what he expected... Source: Yen Press

While Basara, Mio, and Yuki have picked up their seemingly ordinary lives, they are attacked by magic-wielding humans when preparing for the upcoming sports event. Basara tries to become stronger by strengthening the testament when Rukia, Maria's sister, suddenly appears. Unknowingly, the war deciding the future of the demon realm has started. Source: ANN