K is the name of a multimedia anime/manga franchise created by GoRA.
Yashiro Isana has lived a relatively ordinary, simple life. He lives in the technology-advanced Tokyo Metropolis and attends Ashinaka High School, a notable high school that is located on an island just outside the areas. Yashiro is friendly with everyone. Nothing ever seems wrong about him, except perhaps his habit of forgetting where his school's PDA is.
However, nothing normal has been happening since the recent murder of Tatara Totsuka, prominent member of the infamous HOMRA. No one knows who exactly killed him but the man responsible bears an uncanny, identical appearance to Yashiro. Seeking vengeance, the Red Clansmen of HOMRA set out to get Yashiro and kill him.
Below are the characters found available on the site that cosplayers have depicted.