Responses
Not really similar to 'Payback' but adjacent:
At the end of the road
Netkama Punch
Dawn of the Dragon
My way with you
My bias is showing
And honestly those that are similar but well-known so that you also already know but covering my bases:
December (from the same author as Payback)
Cry me a river
Reunion
looking for (preferably)bl stories where one of the love interests has been looking for the other with limited knowledge (similar to the manhwa "Payback"). or something of the same reveal effect please