"Friends" with Benefits: Niall Horan Fanfiction

Freja and Niall were friends since they were younger. Freja grew up to be independent and intelligent, while Niall grew up to become a party animal with no grasp on reality. After years of not speaking to each other, Freja and Niall reconnect. But unfortunately after their brief reunion, Niall convinces her to become more than a friend. No, not his girlfriend - he convinced her to become his "sex buddy". Will they fall in love with each other? Or will one of them end up getting hurt?