He was in a school of Mauritius in the Camille's class when a new student arrived (prétérit car c'est du passé).
On ne dit pas "the class of Camille". Quand il s'agit d'un être vivant il faut utiliser le "'s"
Ex: My father's appartment, My dog's food,
Si c'est pluriel, utilise juste l'apostrophe sans "s" après. Ex : My parents' home is close to yours, The cats' eyes can see in the night
His name is Lucas. He had brown hair and green eyes, he is very shy. He was sitting down next to Camille. Camille had blond hair and blue eyes. She fell in love with Lucas. After several days talking and joking with him, Camille wanted to go to the beach
with him this on Saturday. On the beach, they swam and they panicked, Lucas fell in love with Camille. And then, he asked Camille whether she wanted to be his girlfriend, Camille replied yes. She was so happy that she decided to tell her father, but when Camille came back home and tell her father she loved Lucas, her father did not accept that she had a boyfriend before its 18 years so he wanted to meet the Lucas' parents to explain to (toujours la préposition "to" avec le verbe explain) them the situation. Lucas’s parents accepted to meet Camille's father of Camille. Lucas begged his parents to change the mind of Camille's father.
After the meeting, Lucas could not see Camille so he decided to go to the Reunion island in order to change school and be away from Camille, but Camille could not live if she wasn't able to see Lucas; she bought a ticket for the same flight as Lucas's one.
Lucas' one = celui de Lucas (le billet d'avion de Lucas).
Lucas was surprised but very happy to see Camille in the same plane. Camille told him
that she can’t live without him. But the plane crashed and sank into the sea. Rescuers found Camille Lucas unconscious and clinging to each other on a plane piece. After the accident, Lucas woke up in a hospital and asked the nurse where Camille was. The nurse said that Camille was seriously injured and is in the operating room. Lucas was very worried. After ten minutes, the doctors left the room and told Lucas that Camille was dead. They couldn't do anything to save her, and she was too seriously wounded (= injured mais ça évite les répétitions). Lucas saw Camille lying on the
table. He could not live without Camille. Lucas committed a suicide by holding Camille's hand.