My manga would be called Elemental Berserker!
The story would revolve around a boy named Sora Ito who resides in Tokyo - Yokohama. At his school, he is a Bancho and carries his own gang that is feared in the other districts of the city. Ritosuke Watanabe and Haruka Kikcuhi are his two best friends. Rito's parents are wealthy folk who own a company that constructs robots and mecha's, Haru's older brother runs a plant shop which makes lot's of business since Japan is losing much of its forest.
Together, the trio is unseperable. Until ...
Rito is kidnapped by the Yamaguchi Yakuza family! A man named Ryu is responsible for the act. His reasons for doing so is that Sora behaved agressively to another boy in his ninth grade class, Enma Yamaguchi for picking on Rito.
Despite Sora and his gang trying to stop them, they are all defeated. Ryu reveals that Enma is the son of the boss of the family. And if Sora really wants to stop them, he'll come to the headquaters of the Yamaguchi Yakuza family house and surrender his life in exchange for Rito's.
He has exactly a week to do so, or they will kill Rito. During all of this, Ryu also reveals that Rito's family fueled the Japanese government with weapons in the civil war that occured ten years ago from the start of the series. It was between Elementals, japanese people who can control one of the five elements and the regular japanse people. The regulars won and put strict regulations on elementals.
When Sora returns home that day, he discovers a man named Tsubasa waiting within his apartment.
Tsubasa tells Sora the he is his new home tutor as his grades in school have been dwindling. Sora, who's friend just got kidnapped has no interest in discussing history, so he decides to leave and break the news to Rito's parents who are heart-stricken when they hear the news.
After Sora returns home, he notices Tsubasa has moved his stuff into the spare bedroom. Demanding to know what's going on, Tsubasa tells him that he must live with him until he passes his first year in High School.
Later on that night, Sora breaks and tells Tsubasa about what's occuring. Tsubasa is quiet throughout the whole thing until Sora brings up the war in which Tsubasa begins to act strangly.
Sora presses Tsubasa for information on it and he reveals that he fought in on the side of the elementals. Sora surprised ask Tsubasa if he can rescue Rito. Tsubasa turns down his plea and instead offers to teach Sora how to unlock his elemental prowess. Sora agrees and discovers he's wind element during a brief excercise.
After some rigorous training, Sora has at least some knowledge on how to use his wind and decides to confront the Yakuza. While Tsubasa says he will not participate, he will still be there to watch over him. Haru also wants to go.
Upon entering the facility, Sora manages to take out the lackies using his newfound abilities. Tsubasa is surprised he caught on so fast and comments on how he just might be able to become the Sky King, a title that only the best Wind element user can achieve.
Sora eventually comes across Ryu who turns out to be a fire elemental. They battle in an epic sequence where ultimately, Sora wins but is severly weakened. Haru reveals a latent ability she's had since she was a child and heals Sora. Meanwhile, Ryu crawls back to the boss and begs him to help him. The boss agrees and extends a hand only to toss Ryu to the side and launch an energy blast at him.
Sora blocks it and has Haru heal Ryu while he battles the boss. The battle appears grim as Sora is no match for the boss, but Ryu joins Sora's side and they bothe defeat him. Afterwards, Rito is returned and Ryu goes his own way.
Back at home, Tsubasa reveals to Sora that he never really was an elemental, but absorbed Tsubasa's ability to use Wind. Tsubasa reveals that if he can learn how to control his power. he can learn all five elements, essentially becoming an Elemental Berserker and wreck whoever comes his way ...
