Kura's business model is to take exceptionally well qualified and motivated students, put them through an intensive (and costly) programme of interviews, simulator flights, Etc and groom them for an airline interview. What they do, they do well. And their success rate, whilst small in numbers, is impressive.
However, one of the reasons they are successful in placing these students, is that they are highly selective and only take the very best. One could argue that these guys are going to make it regardless of Kura or not.
So the 'tie up' is only as as far as an agreement to put some students in front of Kura and let them decide whether or not to take them (and their money).
It comes from OAA. The current GM/HoT was at OAA once upon a time and had this connection. Of course it worked well in OAA where there are many bright, motivated cadets. Doubtful if Kura will be taking many from AA. They certainly haven't to date.