A Wish of my Sister ( Onee-chan no Onegai) is an erotic one-shot Japanese manga written and illustrated by Masahiro Itosugi about a series of short stories where the relationships of Keisuke his sister and his classmate take up four of the total eight chapters. The manga is serialized in Icarus Publishing's magazine Digital Comic AG from issue 56 in March 2007 to issue 65 in August 2007. Akaneshinsha released the manga in Japan on June 24 2006. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Written Work