A joint concert would be great, but I wonder how Kanon and Ayaka are feeling. If Juice=Juice doesn't have to do a challenge to debut, it must be quite hard on them, cause s/mileage worked very hard for those smiles.
But I still think it would be great I would like duets >3<
Karin and Kanon
Aina and Rina
Yuka and Ayaka
Akari and Akari
Sayuki and Meimei
Kana(tomo) and Kana