So is oneshot not canon or what?
Retconned. Enjoy your harem.
What does retconned mean?
How can you not know what retconning is?
It means past event was altered to fit current events in the story by the author
rip in peace oneshot
No, but does it even matter?
I can see it being reworked into the story
It's probably what the ending will be, them all finding out that they're not really dating and them resolving it. Since they've been dating for a year or so we're probably 1/3rd of a way through the story so we've got a long way to go still.