Okay. We know this one. The protagonist needs to hide some kind of secret from their family or make their ex jealous. And what better way to do that than by getting hitched to a random stranger?
But the fake relationship always leads to real feelings — much like in “Marry Me, Mary!” or even “Fated to Love You” — and now the protagonist and the cute stranger-turned-love-interest are struggling to balance the fake relationship with their very real, very romantic feelings.