There is ff called Make YOU mine like that, idk exactly.
In that tae fall for jk at first sight at his birthday party, then try to confess due to shy and nervous he didn't. He thought make himself' worth for jk and propose him and he went for USA for further study and business. After 6 years he came back to Korea and his hyung suga marriage was arranged, and he was HURT knowing his love life(jk) is going to be hid brother in law. He can't do anything , he was helpless.
Meanwhile suga was in love with jimin , he can't tell to his family, so he said to yes for s marriage with jk, guessing jk will reject him ,unfortunately jk also agree with marriage, since he don't have any reason.
At marriage day, suga runway saying he was in love with someone can't marry jk, sorry. Then later tae father and jk father make them get married together due to announcement has been done about jk married. For reputation sake.
Later taekook move to America, tae take care of him,like jk is petal and jk fall for tae, for his care, his affection , his love.
It's ongoing fff