Hi everyone I watched tu mera hero starring priyansh n sonia which was produced by same production house.Ye un dino ki baat hai love story is very much simular to that serial.There r many simular scenes also
1.heroine trying to find last digit of hero's phone number
2.heroine making hero study for xams but it isn't productive.
3.heroine always wishing hero to be her husband
and so many things r simular I think thus d real story of producers.Anyway according to that story line hero is very careless n aimless but heroine is simply perfect in work.Initially heroine n hero r just frnds even after marriage.heroine makes so efforts to make him have a aim n hero changes very slowly n falls for her (in steps of respecting her,trusting her,seeing her dedication for their relationship n finally falling for her).In this process of falling for her he'll become zero to hero.
So I think d same repeats here
1.Sameer starts respecting naina due to her good nature n stop calling her behenji.
2.In process of impressing her he'll improve his studies n will have change in daily routine.
3.he will treat her as good friend as she'll respect him n praise for his good heart but not for good face
4.And finally he'll knowingly or unknowingly fall for her when she herself puts into a deadly problem to protect him then he understands her seriousness towards their relationship.
5.By d time he change for good n about to tell truth regarding bet.I think it will come out in a wrong way n naina leaves him
6.The moment she left him he'll realize his love for her..
Sorry for d long post this just my guess as d storyline n many scenes r simular