LetsGetShwifty
The jacket was from Jungkook's first year of university, where he played varsity basketball. He quit shortly after - it turns out being a full-time athlete had its toll on an already hectic schedule. Yoongi completely drowned in it, but Jungkook thought he looked adorable.
When Jungkook voiced his thoughts, Yoongi flushed a beautiful shade of pink, a somewhat fuchsia pink, and stammered about something, babbling something about how Jungkook should respect his hyung, but Jungkook wasn't listening.
He was in awe of what he saw. He had never seen something quite as cute as the sight of Yoongi looking like a tiny kitten struggling to get out of an overly large blanket.
He interrupted Yoongi and told him that the jacket looked better on him and that he should keep it for himself.
(And if the jacket had Jungkook's name on it, well, that was just a plus.)
or
the yoonkook heather au that no one asked for but i wanted it so badly i wrote it myself
A/N THIS IS MY WORK FROM AO3 https://archiveofourown.org/works/34364653?view_full_work=true ORIGINALLY POSTED HERE