The song is good I give 5/5 for the effort. To all the fu((kin haters. I bet that you have never created anything in your entire life. I bet that you sit in front of Fox/Zee/Sony TV and watch American or Indian Idol and Saregama and think you know everything about music to post degrading comment about our fellow Nepali brother trying to create a good music. That's the fu((kin typical Nepali mentality that cannot encourage any creativity and instead bash the looks of the singer. So either go and create something meaningful or fu(k yourself.
Having said that I have couple of suggestions for the creators. You did a good job and I bet with right mindset you can create something really wonderful. Forget the haters in this thread and take that as an challenge to create something really wonderful.  
Here are some of my feedbacks:
Lyrics is pretty good. I don't know much about rapping but seems pretty OK. Music is decent.
Story is very harsh. I would brighten it a little bit more. People already have so many problems with their life. They don't want to see a sad story.
Video is kind of raw. I would have liked to see the guys attire a little refined. It didn't jive well that the girl was a hottie while her boyfriend's looks (from behind) was unpolished. I don't know maybe that was the intention in the video. Also the previous comment that the girl's ass is focussed more should be taken into consideration. It makes the girl look kind of cheap. 
Once again good effort from you guys and hope that in the future we will get to see you guys make some more good songs.