The Durarara!! Ending Parody originates from the first ending sequence of the 2010 anime 'Durarara!!,' featuring the song 'Trust Me' by Yuya Matsushita. The sequence is iconic for its vertical scrolling animation that depicts the entire cast in a continuous, interlocking chain of characters. Fan artists quickly adopted this format, replacing the original cast with characters from other popular media, ranging from 'Fullmetal Alchemist' to 'The Avengers.' These parodies, often referred to as 'ED parodies,' became a staple of platforms like Nico Nico Douga and Pixiv. The meme is primarily used to showcase the diverse roster of a specific series or fandom in a visually cohesive and nostalgic way.