Hello Listeners! This is Feather Pals by Reiya_Wakayama on A03.
Summary
Izuku as a child writes to Hawks as part of a pen pal program and receives a letter in return. They continue to write to each other.
Winged Izuku.
Trigger Warnings ⚠️
Child trafficking
Attempted Kidnapping
Child abuse
Fic link
https://archiveofourown.org/works/37010560
Image sourced from My Hero Academia Anime series