Sayuka Koenji, an amnesiac turned warrior known as Escalayer, is the only hope against the invading Dielast. Her power source, the Doki-Doki Dynamo, requires intense physical and emotional excitement to function. To ensure she can protect the planet, Kyohei Yanase is recruited to help charge her energy through intimate encounters. After defeating a Dielast monster during a staged date, Kyohei begins to wonder if their rekindled connection can restore Sayuka's lost memories.
Sayuka struggles to maintain her transformation energy during a monster attack, only to discover an unexpected way to recharge. Meanwhile, a superior clone named Madoka arrives from Dielast to eliminate Escalayer, lacking only the Doki-Doki Dynamo to be perfect. As the battle intensifies, Kyohei is distracted by a seductive encounter with Ryoko, leaving Sayuka to face her mirror image in a desperate fight for survival.
Sayuka decides to risk her life by using the unstable Beta version of the Doki-Doki Dynamo to stop the arrogant Misllene. Fueled by her deep romantic bond with Kyo, Sayuka transforms into Escalayer and engages in a fierce battle. By harnessing the true power of her heart, she overcomes Misllene's superior technology and secures a hard-won victory, strengthening her resolve to protect the Earth.