Mezzo Forte

Mezzo Forte (メゾフォルテ, Mezo Forute) is a 2000 OVA created by Studio ARMS and Green Bunny, and was abridged into a movie in the United States. It later gained an 2004 anime sequel titled Mezzo DSA that is licensed by ADV Films.

Plot
Mikura Suzuki, Kenichi Kurokawa, and Tomohisa Harada are the 3 members of a mercenary business called the Danger Service Agency (DSA). Mikura is the brawn of the group, Harada is the brains, and Kurokawa is just a bitter ex-cop who likes to think he's in charge. They'll take on any job as long as it involves lots of danger and, of course, money.