It depends on how you define a 'true story'. While it may draw inspiration from real-life situations, it likely has some fictional elements added for narrative purposes. But overall, it has a basis in reality.
Once upon a time, there was a little beaver named Benny. Benny lived in a cozy dam with his family. One day, Benny decided to explore the riverbank on his own. He found a shiny pebble and was so excited. But then he got lost. He tried to find his way back by following the sound of the flowing water. After some time, he finally saw the familiar shape of his family's dam and happily ran back home.
Once upon a time, there was a little beaver named Benny. Benny lived in a cozy dam by the river. Every night before going to bed, Benny would help his parents gather some extra twigs to reinforce their home. Then, he would wash his furry face in the cool water. As he curled up in his little nest, he would look at the stars through a small hole in the dam and dream of building the biggest, most amazing dam in the whole forest. And with those sweet dreams, he would gently fall asleep.
Once upon a time, there were two little beaver kids. They lived in a cozy dam by the river. One day, they decided to explore the other side of the river. They swam across bravely. There, they found a big oak tree that had fallen into the water. The beaver kids thought it would be perfect for their dam. So they started to drag it back home bit by bit. It was hard work, but they were determined. Finally, they got the log back and made their dam even stronger.
Once there was a beaver named Benny. Benny was always up to some silly antics. One day, he tried to build a dam in the middle of a small puddle in the forest. He dragged twigs and mud all day, but every time he thought he was done, a little frog would jump in and break it. Benny got so frustrated that he chased the frog all around the puddle. Finally, he gave up on that puddle and found a bigger stream to build his masterpiece dam.
In this fanfic, Tracy Davis could be an original character created by the author. She might be a witch who has her own story and reasons for being betrothed to Harry.
The beaver's family life can be a great part. Maybe there's a mother beaver tucking in the little beavers, telling them stories about the great beaver ancestors and their amazing feats of engineering. Also, the relationship between siblings can be included, like how they play together during the day and then go to sleep side by side at night.