I'm guessing the premise will be that the popular video's of Urumin online are her getting clowned/dunked on. MC will then set out to earnestly proselytize to the masses about how his waifu's clumsiness is actually her greatest charm, even if it means [losing] the opportunity to interact with her as intimately as they have.
What's the plot twist: Urumin will gain more (positive) popularity, but everyone will be so impressed by his simping and more people will ship them together. That and/or our boi pulls out the rizz and his sick dance moves again, leading to him going viral instead... Cue much jealously and increased boldness from our favorite idol leading to more shenanigans involving our favorite bacouple.