Fudou Aikawa and Desumi Magahara have just started dating, but no one is allowed to know! Nicknamed "Red Gelato," Fudou is the leader of "Gelato 5," a group of heroes dedicated to protecting Japan. On the other hand, the "Reaper Princess" Desumi is one of the combatant leaders of "Gekko," an evil secret society bent on world domination and considered Gelato 5's greatest foe. As they pretend to be mortal enemies, Fudou and Desumi sneak away from battle to spend time together. Despite their inexperience with romance, Fudou and Desumi strive to make their relationship work while avoiding suspicion from their comrades. With their loyalties divided between each other and their respective sides, the couple will have to stay on guard if they want to keep their love a secret from the rest of the world. In the eyes of the public, Fudou Aikawa and Desumi Magahara are sworn enemies who have nothing in common. Fudou, also known as Red Gelato, is the leader of the hero squadron Gelato 5, whose mission is to bring about world peace. On the other hand, Desumi is the minion leader of Gecko, a villainous organization seeking world domination. However, despite these differences, their relationship is not quite what it seems. When they are not making a show of being at each others throats, Desumi and Fudou continue to pursue a forbidden love.