While out and about at the amusement park one afternoon, Toshio races ahead to secure the optimum perspective of the upcoming Creamy Mami concert while Yuu leads Midori through a roller coaster ride in which he faints; while taking responsibility for Midori is relatively simple and straightforward, finding a private location to conduct the henshin into Creamy Mami proves to be a challenge for Yuu -- especially when a secluded location is a house of mirrors that causes the henshin to summon a mirror image doppelganger that wastes no time causing an uproar around town...