Naruto Clash of Ninjas 2 Gamecube Help?

Hi, well I rented this game, and I'm on story mode. currently on story 11, and im fighting three rain ninjas in the forest and lost sasuke and sakura. anyways, while im fightin the rain ninjas they don't have a health bar and ive killed them all but they keep coming back. so do i just keep going till it says i win, because ive been fighting them and nothing happens.