In the beginning of floor 81 a bit into the scene where Kirito and Asuna's marriage status was cancelled, you get an in-event option to try and send a mrriage invitation to one of the other girls. (including Yui..... O.o ) Does this do anything for the story or route, does it just give you an extra little scene involving the chosen character, or does it not really do anything at all?
Also, the Kirrito's memos suggest you use Asuna as your partner in clearing the floor; does anything happen if you don't use her, or do you just not get the next step of the Asuna event?
I'm not yet very good at Kanji's but as far as I can tell, they're only testing if Kirito's marriage status is really gone by trying to send an invite to one of the girls. I don't think it'll affect anything so feel free to choose any...
Video games ruined my life. Good thing I have two extra lives. XD