If you're looking for anime similar to Black Lagoon, you might like these titles. All recommendations are made by Anime-Planet users like you!
Toudou Gakuen is no ordinary high school. There, during the Meiji Restoration, fighting masters were forced to gather from all over Japan to re-establish the martial arts. Amongst the student body is a group of immensely powerful fighters who maintain order through absolute power. This "Enforcement Group" is locked in a feud with the Jyuuuken Club over matters of love and death. Now, two newcomers have disturbed the order of this school, becoming entangled in this vicious feud. Caught between sexy babes and terrible powers, the battle to be the strongest begins!
Henrietta is a young girl who works for a "welfare group" that does the government's dirty work. Cybernetically-enhanced and specially-trained, she is one of a group of elite hit-girls, remorseless killers with no memories of their past. Jose, her partner, has taken care of her since she was brought into the organization following the murder of her family, and struggles between his affection for her, and his opposing duty to his employer. But, time is running out.. for with each bullet they fire, Henrietta and the other girls lose a little more of their humanity.
There are some semilarities, both main characters are gun experts, but in Gunslinger Girls the characters are a bit emotioneless, but still the girls still have some relations of friendship between each other, in both anime there's a lot gun action, in both they take in dirty work from the bigshots and before the main story a lot of the charcters had different lifes from the ones they have now.
Strange recommendation is it not? Follow along with me a second. Forget Misaka and the other girls, and forget about Rock and Revy.
The real character in both of these series are the Cities they both take place in. Academy City, the home of the Railgun and Index story is a thriving bustling metropolis with an underlying sinister nay almost evil side to it.
Black Lagoons Roanapur is a gritty, ugly place where the sinister underside and evil is clearly out in the open for all to see.
Both series revel in the characters trying to survive their day to day lives in the swirling whirlpool of their cities influence.
I can't think of two completely different series on equal footing.
22-year-old Ryouta is an unemployed good-for-nothing who spends his days living at home and playing Btooom, a wildly popular online game that's sold over three million copies worldwide. Alongside other teammates, Ryouta battles it out with others using powerful bombs and sonar that can reveal hidden enemies, and his dedication has earned him the title of Japan's top player. But soon, Ryouta's pastime becomes a terrifying reality, as he and many others are dropped onto a tropical island and forced to play Btooom – but this time for real. Now, he and the rest must fight to the death by whatever means necessary, as the only way to win this deadly game is by killing seven of the other players.
The dark action fantasy manga follows the title character, Akame, a girl who was bought, and raised by the Empire as an assassin. After meeting Akame, a boy named Tatsumi vows to stand up to the evil of the corrupt Empire with the secret assassin group Night Raid and special weapons known as Teigu.