Yal know the anime K ... Is that a manga ?

oh i remember when i tried to find it!! bloody hard when all you have to go on is a single letter （￣へ￣）

Anyways haven't seen the anime, but i'm pretty sure this is what you're searching for
http://www.mangago.me/read-manga/k_memory_of_red/

There is more then one, and a comment on this one tells you which order to read them in (this one is the 1st one)

http://myanimelist.net/anime/14467/K scroll down, check related anime and then adaptation