Darling in the FranXX ในอนาคตที่ห่างไกล กลุ่มเด็กที่รับภารกิจต่อสู้กับพวกเคียวริว (Kyouryuu) โดยใช้โรบอตเรียกว่า Franxx เพื่อปราบพวกนั้นและแสดงการมีตัวตนของตน เรื่องโฟกัสที่ Code:016 (ฮิโระ) อดีตผู้มีฝีมือแต่หลังผิดพลาดเขากลับถูกเมินจนเหมือนไร้ตัวตน จนกระทั่งได้พบกับ Code:002 (ซีทู) สาวปริศนาปรากฏต่อหน้าเขา darling in the franxx ตัวละคร
In the distant future, humanity has been driven to near-extinction by big beasts referred to as Klaxosaurs, forcing the living humans to require refuge in large defensive structure cities referred to as Plantations. kids raised here square measure trained to pilot big mechas referred to as FranXX—the solely weapons glorious to be effective against the Klaxosaurs—in boy-girl pairs. Bred for the only real purpose of piloting these machines, these kids unskilled person of the surface world and square measure solely ready to prove their existence by defensive their race. Hiro, associate aspiring FranXX pilot, has lost his motivation and confidence once failing an inherent ability check. Skipping out on his class' graduation ceremony, Hiro retreats to a forest lake, wherever he encounters a mysterious lady with 2 horns growing out of her head. She introduces herself by her codename Zero 2, that is understood to belong to associate disreputable FranXX pilot referred to as the "Partner Killer." Before Hiro will digest the encounter, the Plantation is rocked by a explosive Klaxosaur attack. Zero 2 engages the creature in her FranXX, however it's heavily broken within the skirmish and crashes close to Hiro. Finding her partner dead, Zero 2 invitations Hiro to pilot the mecha along with her, and also the couple simply defeats the Klaxosaur within the succeeding fight. With a brand new partner by his facet, Hiro has been given an opportunity at redemption for his past failures, however at what cost?