Everyone say that love is blind, actually that is right because in love or we can say pure or strong love a lover does not care about the background of his lover if love is pure then it can change the state of mind of people.
And put them together, increase the affection between them like the story represent. this story represent true love of chetan bhagat himself of college time that I like most. this book is such good that bollywood take it to make a movie and that earned a lot..