Mezzo Forte

is a 2000 OVA created by Studio ARMS and Green Bunny, and was abridged into a movie in the United States. It later gained a 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.