I just had to get this out. This feels more like an outline but a prompt. I might actually write it at some point.
During POA, Hermione manages to grab Scabbers and Sirius is allowed back into society after Peter Pettigrew is proven to be guilty. Afterwards, Harry only spends 2 days at the Dursleys and then he is allowed to go off to Number 12 where Sirius begins teaching and spending time with Harry more with the aim of showing him more of the magical society that he can only experience with family (gatherings, attending events etc.).
Harry first meets Fleur in a party he attends with Sirius. Fleur is alone in the garden and Harry stumbles into her. After fumbling and later moving to leave, she challenges him to a wizard's duel that she narrowly wins (due to experience with actual dueling and Harry just unleashing raw power which catches her off guard, or he could straight up beat her which surprises her).
Fleur's family, considered one of the most important families in France wants to have some footing in England. Their solution? Arrange Fleur's marriage to Harry. They find this out after their duel.Although Fleur's face was neutral she was just as surprised. She knows her duty to her family and her heritage so she accepts it. However she wants to understand and get to know Harry first before marrying which her mother accepts.
Harry spends the rest of his summer in France, visiting their house from time to time. During their meetings Fleur would always challenge Harry to a duel. Gabrielle, of course, wants to marry Harry. Despite their arranged marriage, Harry manages to talk to her with ease and she enjoys their bouts.
Harry still goes to the Burrow to meet up with Ron and everyone else for the Quidditch World Cup. He fails to mention about his arranged marriage. He just knows that Fleur will be there too but with her friends.
Part 2:
Harry still goes to the Burrow to meet up with Ron and everyone else for the Quidditch World Cup. He fails to mention about his arranged marriage. He just knows that Fleur will be there too but with her friends. She hopes she can meet him somewhere there to introduce to her best friend (who she has not revealed about the arranged marriage as well) .
During night time (when the DE attacks) he gets separated from Ron and Hermione. he comes across someone being shouting and trapped, surrounded by 2 DE. She saves that girl by some miracle. It turns out this girl is the daughter of the French Minister of Magic (and is also the best friend of Fleur Delacour). She takes an initial liking at Harry and mentions that they might meet again soon. Gives Harry a kiss on the cheeks and Harry notes that she has a warm/cheerful personality.
Harry and Fleur did not get to meet again as travel was explicitly banned for a few days following the attack. Fleur wrote to Harry asking if he was okay. They start writing more as Harry begins missing the days spent in their courtyard. Fleur also mentions that they might be meeting again.
The daughter of the minister (let's call her Charlotte for now) came for the Triwizard Tournament, and everybody swooned as she was very beautiful and comes from a very noble family. Ron of course was smitten. Ginny rolled her eyes and Harry smiled. Then Fleur came in and everybody was silent. She was devastatingly beautiful that day and Harry almost wanted to stop everyone from staring at his betrothed. Everyone was dumbfounded. Ron says she must be a Veela.
Last part:
During the feast, Charlotte comes over asking about the bouillabaisse and says hi to Harry and asks if she could bring him over to her best friend. She drags him by his arm towards Fleur who quickly grew red but managed to keep a neutral face. Agreeing through their letters that they would keep their arrangement private until they figure out about their relationship, they awkwardly say hi to each other like it was their first time.
This is very much flowerpot. Charlotte is just there to add spice or whatever as her warm/bubbly nature will somehow make Fleur take decisive steps about her feelings towards Harry.