Apparently weddingdress-Mano is supposed to be current, idol-Mano and plaid, streetclothes-Mano is supposed to be Mano a few years from now looking back on her time as an idol. I didn't realize that when I first watched the MV but I guess it makes sense.
I don't care for Mano, but I hope she gets over 20k. It's her last single so she deserves comparatively decent sales
Edit: just looked it up and apparently this is one of her highest sales since her first two singles. Good for her.
Edit edit: just watched Otome no Inori again and that song is hauntingly beautiful. Just an amazing single. Tsunku? Why didn't you just keep going that route with Mano????