Akari Ōzora's previous roommate, Yū Hattori has gained popularity through being a "Travelling Idol"! Now, Yū and Akari's unit Luminas are heading for Kyoto at the same time. The TV program in Kyoto that Yū was planning to attend turns out to have also invited Luminas. The reason behind the brilliance of Yū right now is thanks to a promise made between her and Akari.
