Fudo Aikawa, who doubles as leader of a heroic Sentai team, Red Gelato, and Desumi Magahara, who doubles as combatant leader Reaper Princess for an evil secret society, have fallen in love! Can these two mortal enemies keep their relationship secret while their organizations fight in the background?!

Red Gelato and Reaper Princess pretend to run off to have a duel to steal some alone time together. Desumi asks Fudo to take her on a proper date, but Fudo has no experience in the matter! Can his comrade Yellow Gelato offer him some good advice?!

Fudo is feeling antsy after two weeks without fighting or getting to see Desumi. When it's revealed that Gekko has developed a new weapon, he volunteers to infiltrate their base!

Haru invites Fudo to lunch to try to ask about his suspected girlfriend. But when Desumi spies them together, she can't help but feel shaken... a feeling that soon shows itself on the battlefield!

Desumi learns that she's going to be promoted to monster executive, and ponders what this might mean for her life going forward. Meanwhile, their planned date to the beach happens to coincide with Gelato 5's robot testing...

After meeting her at the beach, Daigo realizes that he recognizes Desumi. Will the things he reveals affect her relationship with Fudo... or even Gelato 5 itself?!

Fudo receives a letter threatening to expose his relationship with Desumi. But when he meets with his blackmailer, a surprising truth is revealed!

Desumi's father arrives to interrupt the couple's alone time, bringing along Desumi's little sister, Urami. Both of them seem to disapprove of Desumi's recent life decisions. With Fudo's help, can she make her true feelings known?

Desumi invites Fudo to her high school culture festival, where they hope to have their picture taken atop the "Kokutei Moon." But complications abound, as members of Gelato 5 and the Princess Series alike seem determined to foil the couple's best-laid plans!

The masked Judgment Princess always eats on her own in the cafeteria, prompting Desumi to take interest in the solitary girl. But her invitation to the rest of the Princess Series to have a strategy meeting in her room turns out to be... a slumber party!

Deep in Gekko headquarters, the birth of the Ultimate Phantom approaches. Meanwhile, a commercial opportunity for Fudo earns him Desumi's ire. When Gekko's ambitions lead to a world-threatening crisis, can the couple make up in time to fight back?!