Air Gear: Kuro no Hane to Nemuri no Mori - Break on the Sky

Air Treks, a futuristic progression of aggressive skating, have become popular among young people across the country, and gangs are forming all over that participate in different activities while using their A-Ts. Ikki, a middle-schooler who belongs to the gang "The East-Side Gunz," is the hardest street-fighting punk in the east side of the city. His four beautiful adopted sisters, who took him in when he was a child, now reside with him. Ikki is unaware that the females are members of "Sleeping Forest," one of the most notorious A-T gangs. It doesn't take long for Ikki to discover about the world of Air Treks and be thrust into a destiny he had not anticipated. Along the road, he learns about his background and makes a lot of storm riding allies.