Manan ff Secret relationship of lifetime enemies

Manan are known to be lifetime enemies who are believed not to tolerate even each other's Shadow .
If they are present together you can enjoy your whole day enjoying their lifetime enemity. And the more their friends and family try to bring them closer the more hatred grows in them towards each other.

That's how they behave in front of the others but are they really enemies or some more secrets are in there.
Now that's the question.

So to know more let's peep into the story and explore it .