A Concept:
One reason Julian hadn’t pursued a romantic relationship with Garak is he feared the increased scrutiny from Starfleet that such a relationship would necessitate and what it might reveal.
But after his augmentations are revealed, in the midst of anger and hurt thinking his life and career are already ruined, he finally confesses his feelings to Garak.
I’m just picturing him bursting into Garak’s quarters (or even his shop?) full of tears and anger and basically shouting “I love you! My life is over and I love you!”
Poor Garak would be so thrown off. Just picture his face! The range of emotions he would go through. Probably become convinced Julian is having some sort of episode. (Is that Betazoid back on the station?) But eventually he gets the whole story out of Julian. And they kiss.
When Starfleet decides to let Julian stay, Garak worries their romance is over, but Julian assures him that he’s not letting him go.