Mayur no title yet FF idea - tell me what u think

hey guys
i want to start a FF on mayur and i have a idea but i want to know if it is good or not
here it goes

it's about mayank & nupur in college...basically the way it is now...but there was another girl in mayank's life...someone who he loved a lot but left him....now comes the twist....the girl looks exactly like nupur...like a copy of her...duplicate....mayank & this girl (not saying the name yet) were madly in love...she was a part diya's gang and was samrat's best friend...but she fell for mayank....something happens and she leaves (when i say leave - there are 2 ways - either she leaves the city or dies - not saying which on it is) ok so she leaves and mayank is heartbroken....then 2 - 3 years later nupur & gunjan come to the college....and from there the story will continue (can't write everything here)

so what do you think...is it a good idea? please be honest

i think it's a different concept n u must try for that.