Liam and Niall have been dating over two years now. After two years, you learn a lot about a person.
For Liam, he learnt that his boyfriend had this trouble streak and tends to do things he shouldn't do and say things he shouldn't.
He decided to change that. Don't get Liam wrong, he didn't want to change his boyfriend's personality at all. He loved Niall for who he is. But, Niall's trouble streak often results in Niall getting hurt. Which is something Liam doesn't want.
So, in order to change that. Liam and Niall talked it over and decided it'll be best if Liam spanked Niall whenever his trouble streak gets him in trouble.
And that's where their adventures begin for this story.