When the last petal falls~one direction/niall horan

Holly, Niall Horans best friend was a bubly and life loving girl. That was until she found out that she had a cancer. Holly was devastated, so when she's close to the end, Niall comes to visit her. While he's beside her in the horrible, hospital room, she passes away. At 11:11 Niall wishes that Holly was still alive. He knows deep down that it won't come true, But somthing unexpected happens. An angel named Layla comes to grant Niall his wish. She gives him a beautiful red rose and says that when the lats petal falls she will be dead forever. But Niall dosent listen to the rest of what the angel says. The part where he may have heard how to keep Holly alive, even after the last petal falls. Holly and Niall begin to get feelings that they have never gotten before. Will Niall save Holly? Or will she have to leave him for good...