beta
She will be super happy for two month. They will be lovey dovey. She will get the present but the day of his birthday, he will tell her that he leaves in another country or city for his athletic career, that's why he keeps the money of his part time job. She will not confess and they will think the other doesn't like them. There will be a separation for some time.2nd MC will step in and get close to her. But in the end, the childhood friends will end up together.
This is not a spoiler, just my guess