Aiki-S is a seinen manga written and illustrated by Isutoshi, which is the sequel of Aiki.
After the battles of the first series, Joukyuu has to stay quiet in Japan teaching martial arts. Even with Veronica and Kageyasu close by, it is so sleepy. Then when a chef offers him a quick trip to US to mess with their gangs, in return for great Japanese food, he jumps at the chance. Dragging both girls with him, along with Bull for good measure, he arrives in America like a typhoon. Will they survive his entry?