Obviously, she turned... Whoa, impressed. MC will kick the door like a badass and will save the day. Then after that the never-ending grind to get powerful~ Yaay~ Then occasionally some minor villains who will target his sister(and probably look down on the protagonist) and some monsters who will work as training('cuz they probably have a core that will boost his cultivation) to our MC, but since he came back on time, perhaps the monster will get more powerful quicker. Maybe he'll find someone on the way and save them or even find the military and totally turn them down?
Some of the templates of this kind of manga or novels. Hopefully, this doesn't have too much cliche or hopefully, it doesn't destroy the manga.