No one know what were the motivation that make Ryoga left the Echizen's home in the USA but we can see how sweet were the relation between the 2 brothers.
We are all accustom to see an alone Ryoma that have no idea what is the brotherly love and this movie change our point of view even if for a single time.
We see a child Ryoma that smile when him brother prize him and in the present we see a Ryoma frustrated for the sudden apparition of Ryoga and he can't explain himself the motivation cause he left the USA house a appear only just now.
Even if Ryoga provoke Ryoma a bit we can see how much he love him little brother and this love came out expecially when both them safe the Seishun's boys from Sakurafubuk and co. during their match.
The brotherly relation between them is particular and give to who watch them in the movie a flavour similar to the marmelade's one: sweet and bitter at the same time. Two no-blood brothers with a strong relation and a grand dream to find and follow..
Note wrote by Nekoi Echizen
A fanlisting is, quite simply, a listing of fans. Fanlistings are similar to any other group or club you might join. You can join a fanlisting to 'show your love of something.' Most fanlistings have small codes, buttons, or plaques available which you can display on your own website if you'd like. Our site definition of a fanlisting is: "A fanlisting is simply an online list of fans of a subject, such as a TV show, actor, or musician, that is created by an individual and open for fans from around the world to join. There are no costs, and the only requirements to join a fanlisting are your name and country. Fanlistings do not have to be large sites (although some are); they are just a place where you can sign up with other fans. TheFanlistings.org is the original (but not official) web directory for fanlistings, dedicated to uniting the fans." [From thefanlistings.org]