As children, Ash wasn't romantic and Serena wasn't outgoing, but there was one thing they were: best friends. They were considered as "inseparable" by doing everything together. Eventually, the platonic feels evolved into romantic, and they shortly dated for a while, before the downfall.
This is where Serena was picked up by an international entertainment company, who was greatly impressed by her triple-threat to the music industry (being able to rap, sing, and dance). By agreeing to their contract, Serena becomes the teenage celebrity through time and effort, but this was also in exchange for her happiness with Ash- who breaks up with her because of her distance.
After promotions during her world tour, Serena returns back to the city where she meets Ash again, hoping to make up with him and hopefully date again if he's interested.
Unfortunately, there's two problems:
1) He doesn't remember her, and
2) He has a new girlfriend.
"Promise to never forget me, okay Ash?" Serena toothily smiles, waving her tiny pinky before her best friend.
"I promise. After all, you're the person who means the most to me! We'll be best friends forever!" Ash laughs, interlocking his finger with hers.
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