Although I am quite curious about this manga you tell me about.
Well according to the back of the book since I only have the first one basicly there are 4 characters that have to deal with their past that constantly plauges them...well 3 of them anyway for now.
Warning contains massive spoilers
[spoiler]The first character is an old man named Mihai he used to be a hit man and his boss asked him to raise his ten year old son, Ian, and teach him everything he knew about fire arms and assination 15 years ago. He also was friends with 2 former prosititutes worked in a bar named Kiri and Milena. He was in love with Milena and thinking about marrying her once things settled down, but when Ian turned 15 he killed her for a reason Mihai never learned. Because he raised his gun at the boss' son Mihai was fired and had to run away.
At present time, I think the book is a bit vague on that, Mihai returns to work at the bar that Kiri and Milena used to work for which was now owned by Kiri herself. Meanwhile Ian killed his own father in order to take over the family business and when he learned that Mihai had returned he decided to meet with him to settle things. Little did Ian know that his own followers want to kill him at that time and sent a sniper to do it. Mihai and Ian meet at the cemetary that Milena was buried and started asking each other why they did or didn't do the things they did or didn't do. But before they got any answers the sniper shoots Ian. With hos dying breath Ian says the reason he killed Milena was because he was jealous of her and didn't want to steal Mihai away from him because he's the only one he regarded as a real father. Mihai had a feeling that was the case but he felt he didn't deserve to be a father since his hands are stained with so much blood.
The next character is a young man with long orange hair and an eye patch named Badou. Badou is a chain smoker and works as an "information broker". Well what he does is find dirty secrets of important people and sells them to the highest bidder. This is what's gets him in trouble a lot. In this case he find a mafia boss, uh lets not go into detail of what he finds, and the boss sends his men to get evidence back from him. Badou eventually runs into Mihai and takes shelter in Kiri's bar. The mafia during this finds him and everyone is in the middle of a shoot out. During said shoot out Badou's camera gets destroyed so now he has nothing to bargin with. He then notices that one of the men knocked has the thing he loves most a cigerette. But before he even get's a chance to smoke it one of the guys shoots it. This makes him go beserk and shoots down the entire mob. However since he also damaged the bar he has to fix it.
The third character is a sword woman named Naoto. Naoto and her family were attacked by a mysterious person and is left for dead until a man with the same sword takes her in. Since the man has the same sword she decides that she wants to kill him after he teaches her how the swordfight. The man realizes this and decides that it's better that way rather then her becoming a person with no purpose. It is also explained that because of the attack Naoto has lost some of her memories and therefore doesn't remember her parents faces or even her name. The man names her Naoto, which is somone elses name, for lack of a different one as a man named Magato is coming down the stairs. Magato laughs at the fact that he named her Naoto and then looks at her with the eyes of a sadist.
A few years later Naoto improves greatly but is still not strong enough to kill her master. After the session Magato rips her shirt to reveal that she has a huge X shaped scar on her chest from when she was attacked and gets excited over it. Naoto's master stops Magato and give's Naoto his coat and she sees from a mirror on the ground that he's depressed. A few more months or years later, again very vague on time, Naoto is seen delivering news papers to Kiri's bar. When she returns home she finds that her master is dead and was killed by Magato. Naoto is furious about the fact that her revenge was stolen and fights Magato wanting to kill him. After a long fight and using everything her master taught her she wins.
Magato tells Naoto that the real person who killed her parents was the other Naoto she got her name from. Magato goes on to say that revenge is dreary life a present being crused under the weight of the past but it gave her a reason to live. He tells Naoto to take her master's sword and he hopes they meet again.
The last character is named Hiene. Not much is known about him other then the fact he has a fear of women, a metal collar, is practically invincible, and conection to something called Kerebos. His story starts in the underground when he rescues a prostitute with tiny angel wings. It is later found out that the prostitute is 14 and can't speak, equivilant exchange at its finest, and she reminds Hiene of a girl he used to know named Lily as he start to have some kind of memory lapse. Unfortunatly the prostitute is kidnapped again and her kidnapper leaves Hiene when he thought he was dead.
Hiene is forced to go to the church, with a blind preist, where he hides guns and meets up with Badou which apparently he owes a debt to. He and Badou storm the hide out of the pimps and rescues the girl. The girl finds refuge in the church, even thought the blind priest is apparently a pervert with a lolita complex. The girl finally tells Hiene that her name is Nill and the priest and himself comments that he is comfortable with Nill. As Hiene leaves the church a mysterious man named Giovanni finds him and gets Hiene a bit riled up. Giovanni apparently has something to do with Kerebos and Lily much not much else is explains as he leave as fast as he appears.[/spoiler]