Is there an appropriate name for this kind of outfit? Because wedding_dress doesn't seem to go well with this.

Well cause Mai Waifu prefer a traditional wedding dress~

Added the wedding_kimono tag. BTW, it's called a shiro-maku.

Who's the lucky groom? Since it's Ran, the groom would be much more luckier then the one married to Yukari.

ah, I wondered why it was raining today even though it was clear skies

garyseven said:
ah, I wondered why it was raining today even though it was clear skies

Aaaah!!! Look's like someone said it!
Lol, I was going to make a comment about a Kitsune no Yomeiri too but decided not too.
I was hoping someone else would.

Keo said:
Who's the lucky groom? Since it's Ran, the groom would be much more luckier then the one married to Yukari.

Except the person who marries Ran would be, one way or another, owned by Yukari.

I can think of worse fates than that.