So, like, the ML orchestrates a plan so that he can come in and save the FL in order to get her appreciation or manipulate her? Or as in he's pretending to save her, but in actuality wants her to fall victim to it (like a double-cross)?
If the first:
I feel like Devil Beside You may have had such a scene? But it's been so long, i might be wrong.
If the second:
There might be some scenes in Korean Odyssey that fit?