Melancholy Sunday

S1 E1: Daichi and Hibiki are two high-school friends on the verge of graduation. The latest rumor to go around their school: Nicaea, a "dead face delivery site" that supposedly sends photos of one's friends at the time of their death. When Daichi and Hibiki suddenly meet their own untimely end, they are mysteriously revived by Nicaea and thrust headlong into a long-brewing battle between human and demonkind. Now, armed with Demon Summoning apps and accompanied by fellow student Io Nitta, they must fend off a series of demonic attacks that are targeting the heart of Tokyo.