Lamune and Da Cider embark on a mission to rescue two scantily-clad, stunning maids named Gold Mountain and Silver Mountain, also known as the Mountain Duo, from Puff-Puff Palace. This action incites anger in Milk and Leska, who reluctantly joins forces with Cocoa in a perplexed state. Together, they transform into Seinaru Milky, Seinaru Cacao, and Seinaru Lemon, and set off to seek revenge on their partners.