Koroshiya-san: The Hired Gun
Genres: Action, Comedy, Suspense
Type: TV, Episodes: 10
Aired: Oct 11, 2013 to Dec 13, 2013
Studio: Opera House
Source: 4-koma manga
Rating: PG-13 - Teens 13 or older
Synopsis:
The comedy story follows the title character, who is regarded by himself and others as the best hit man in Japan. He goes by the motto, "If I have an assignment, I will kill anything." However, his "killing" assignments have expanded to include everything from summer vacation homework to housekeeping. "The hit man never fails to kill the target. Though he does not aim to, he also never misses the laughter."

(Source: ANN)