Kamen Rider Series S30E18 - This Is How I Arrange My Flowers

In the first part of the corporate challenge, an ikebana contest, ZAIA Enterprise's human representative easily defeats his HumaGear opponent. However, Gai learns he cheated and calls for a rematch against a reset version of said HumaGear. Following this, the ikebana artist is approached by a mysterious figure and transformed into a Raider, a new type of monster that uses Progrise Keys.