I know the choice was made to use canadian english as the basis for the hokkaido dialect but as a canadian my brain keeps thinking these two are the only normal people and everyone else talks a little funny lol
Honestly it's just refreshing to see an interesting premise where the characters are also proper adults and not just highschoolers or collegs students.
What a nice onee-chan, truly. Gotta appreciate she how just went "fuck it why not since you asked so nicely" when she thought it was for fapping material. Truly queen shit right there.