Inhun AU inspired in part by the direction they've been taking Regina's character in TVL so far:
In-ho going out to grab something to drink while he's in the States after giving Ga-yeong Gi-hun's possessions. While he's out, perhaps the guy he encounters (haven't thought of a name yet, sorry!) is a bartender, but whoever he is, he is the spitting image of Seong Gi-hun. Hearing him speak American English without missing a beat damn near gives In-ho whiplash, but there's no denying it. He sounds like him, smiles like him. Maybe he looks a few years younger, a bit more tan. Fuck, he's practically glowing in his happiness. Maybe his hair is longer than In-ho's ever seen it, pulled back into a hair tie, and he's let his facial hair grow out a bit. But In-ho would recognize him anywhere.
Except this man doesn't show the slightest hint of recognition at the sight of In-ho, which in itself presents an opportunity.
In-ho visiting the bar every night, and the stranger serves him with a smile every time, tries to engage In-ho in small talk. Meanwhile, a seed of delusion has been planted inside of In-ho's mind. It can't be him, In-ho saw the body himself, left the corpse behind on the island along with the others, yet here he was. In spite of what reason tells him, part of In-ho believes it's him, or lets himself believe it is. The resemblance is too uncanny to be pure coincidence, too close, too perfect of a copy, at least physically.
Unfortunately for the poor bastard, In-ho being In-ho, he becomes obsessed with him. Becomes obsessed with molding this complete stranger into the Gi-hun he once knew. In In-ho's mind, this is the person he was meant to be, and he would have Gi-hun back again at any cost.