the Garden of sinners Chapter 1: Thanatos. (Overlooking View)

What is the Garden of sinners Chapter 1: Thanatos. (Overlooking View)?

September, 1998: In the city where Shiki lives, something triggers a spate of mysterious schoolgirl suicides. The connection between the girls who've leapt to their deaths is unclear, although all of them have jumped from the Fujou Building, a skyscraper scheduled to be demolished. <br><br> (Source: Aniplex USA)