who is raj bhasin?

Hey guys i m watching kyunki since last one year,soo i don't know so much details abt kyunki's charecters.so could someone pls tell me that who is raj bhasin?and why he is an enemy of tulsi and virani family.??🤢

Raj Bhasin was a friend of Tulsi's cousin sister Kesar wo loves Kesar. Even before he proposes Kesar, Kesar anounces that she loves Anupam Kapadia and marries him. Once time when Anupam Kapadia leaves the country for one whole year on an official trip, Raj Bhasin rapes Kesar because of which Kesar gets pregnant. Tulsi also will be pregnant and both of them deliver in the same hospital the same day. At that time accidentally Raj Bhasin takes away Tulsi's son thinking that he is his son. Later Kesar explains him to give the child back but fails to get the child back. She replaces her son with Tulsi and that kid becomes Harsh(presently he is Mohini's husband). RajBhasin givesw away Tulsi;s kid to somebody and that person sells the kid to Aditya Gujral. Tulsi;s son is Ansh Gujral and Harsh is RajBhasin and kesar's son. Raj Bhasin comes back to get his son from Tulsi and eventually dies. During those episodes, Tulsi and Raj Bhasin have a war and finally Tulsi wins.

ohh..that's what i was wondering!
thanks a lot for the explanation, vinny_rams