Black Lagoon is a manga written and illustrated by Rei Hiroe, published in 2002. From the first six volumes of the manga have been made two anime series, directed by Sunao Katabuchi in 2006. Plot

The plot of Black Lagoon Okajima Rokuro follows the adventures of a simple clerk Japanese is used unknowingly by their company for their shady dealings. Her life changes forever when he is captured as a hostage by a group of mercenaries known as Lagoon Company, who for money will not hesitate to get their hands dirty. Develops a strong empathy with their captors and chooses to sever ties with his gray life and join the mercenary group, becoming just Rock.

The members of Lagoon Company specialize in the delivery of disparate goods (including humans) and are in business with several customers, especially with the Hotel Moscow, an organization linked to the Russian mafia. During their missions are often involved in violent exchanges of fire, fighting with bayonets and several naval battles. Their base of operations is located in the imaginary city of Roanapur in Thailand, and the blows with their boat. The members of Lagoon Company like to eat the Yellow Flag, a bar run by Bao Roanapur.

While the other members of Lagoon Company, Dutch and Benny, good or bad value the intellectual qualities of Rock, the relationship with Revy (the only woman in the group) immediately appears stormy and more than once may result in a deadly struggle.