Niitoki Kei is progressing through the Moon Temple along with Boogiepop. According to Boogiepop, it's definitely true that something is endangering the world right now, but they don't know just how dangerous it is at the moment. Boogiepop explains that things aren't that simple and that they're not sure if the King of Distortion is actually an enemy yet. Kei's stomach suddenly rumbles in the middle of their conversation and Boogiepop offers her a very cute looking bento.
An eccentric billionaire named Teratsuki Kyouichirou created a strange building called the Moon Temple before he died. The purpose for its construction was unknown, so they decided to open it to the public to view to try to gain some money to help pay for its cost. Takeda Keiji happened to be waiting for his girlfriend Miyashita Touka nearby and Tanaka Shirou was visiting the tower because he had once promised Kamikishiro Naoko that they'd go together someday.
There is an urban legend that tells of a shinigami that can release people from the pain they are suffering. This "Angel of Death" has a name—Boogiepop. And the legends are true. Boogiepop is real. When a rash of disappearances involving female students breaks out at Shinyo Academy, the police and faculty assume they just have a bunch of runaways on their hands. Yet some students know better. Something mysterious and foul is afoot. Is it Boogiepop or something even more sinister...?