An important thing I don’t see being pointed out about the volleyball championship in S1
We already know that this championship represents the whole story in short. Belly and Jeremiah seem perfect from the outside, they are playful and have a fun handshake. But as we go further, and they have pressure on them, their foundation cracks. Jeremiah keeps screwing up and Belly is frustrated. Then Conrad steps in and they work like magic, and win, even in the show Belly and Conrad's love and connection is strong, sustainable and long lasting, it came back just as strong even after 5 years. We all know this.
But, if we look closer, we see another detail in the championship that reflects the reality of Belly's relationship with each brother. Jeremiah steps into the game only because Taylor pretended that she twisted her ankle. Belly didn't choose him to be the replacement, the circumstances sort of forced him to be the substitute, and Belly just accepted it and rolled with it. This matches with the idea that Belly only "chose" Jeremiah because of the ongoing situation around her, she is still reeling from the messy breakup and grieving Susannah. We all know that Jelly would've never happened without the grief. Belly would've never looked at Jeremiah twice if everything was normal (like if everything was normal in the game, Belly wouldn't have had to play with Jeremiah).
But Belly herself kicks Jeremiah out and chooses Conrad to sub in. This was a choice made of her own free will. She didn't just go along with whatever was happening and lose the game, she actively chose for Conrad to step in. This also matches with the overall story, Belly wholeheartedly chooses to be with Conrad, not because the situation led her to. Belly could've chosen not to chase him in Paris after she kicked him out, but she did. Belly could've decided that things would get messy with Conrad at the end of S1 (with Susannah's diagnosis), and she still chose to be with him. She chooses Conrad of her own free will, in her own words.
I don't know if this was an intentional detail by Jenny Han but just something I noticed.