Amnesia AU where Viktor has an accident, and doesn’t remember anything after the banquet for the Sochi Grand Prix Finals. The doctors have told them his memory will definitely return, but it may take a month or two.
Viktor remembers enough to know that he is absolutely smitten with Yuuri, but not enough to know that they are engaged.
Yuuri doesn’t tell him about their relationship because he doesn’t want Viktor to feel obligated to be affectionate and lovey dovey with him. So Yuuri pretends they’re just roommates, which is why they live together, and he even starts sleeping in the guest room of their apartment.
He doesn’t realize how physically affectionate he’s become over the past few years, so he ends up being a lot more touchy feely with Viktor than he realizes.
So cue Viktor trying to woo his crush with suave pick-up lines and romantic dates, only to fail every time because Yuuri just has to look at him, or even just touch him (fingers running through his hair, a fleeting touch on the small of his back, a brush of lips on his forehead) and Viktor gets really really flustered and almost dies. Every. Single. Time.
Yuuri can see exactly what he’s going on, but he finds it absolutely hilarious (and kind of adorable), so he goes along with it. Also, he knows that once Viktor gets his memories back, he’ll get a kick out of having gotten the chance to fall for Yuuri all over again.
The rest of their rinkmates also find it absolutely hilarious. Especially when Viktor goes to them for romantic advice.
Phichit (who is staying with them for a while because it’s the off-season and he misses his best friend) somehow manages to gain Viktor’s trust and become his official wingman.
He gives Yuuri regular updates about his fiancé’s antics.