Let's summarise any cliché story:

-The nerd is unpopular.
-She ends up with the bad boy because maybe they're neighbours/their parents are friends/because of a party.
-They slowly fall in love.
-The bad boy's bad past comes back to him.
-They go through a lot of pain but end up together
-They marry even though they're in highschool -_-

I just summarised a (maybe) 50 chapter story in 6 sentences.

That is bad.

Now if you're saying that "maybe you should come up with a story yourself!" Then let me tell you that I don't write teen fiction books, or romantic book. I'm writing a horror one and thinking if I should write a fantasy, so. I can't really write a teen fiction.

Now, I can't help any author with a creative teen fiction story. (You shouldn't rely on others to help anyways, maybe sometimes, but not all the time)
But if you want an idea then you can make a Bad Girl, Good Boy story because there aren't many of these on Wattpad.

You can write a story however you want, but try not to follow those 6 sentences. Go against the flow.