Before the fall, and before the trials of "the Titan's son" Kyklo, a young smith by the name of Angel Aaltonen grappled with the giants as only a craftsman could... The first of the three-part Before the Fall light novels, whose second and third installments have been adapted into a manga of the same name, this prequel of prequels details the origins of the devices that humanity developed to take on the mysterious Titans.

巨人の吐瀉物の中から発見された赤ん坊はキュクロと名付けられ、野生児のように成長していった。調査兵団に入隊したキュクロは、巨人に対抗するための兵器「立体機動装置」を手に入れる。まだ不完全な「それ」は、大きな事故を引き起こすが、キュクロはそれでも巨人に立ち向かっていく。それは自分の宿命なのか、過去の咎なのか－－－。『進撃の巨人』オリジナル小説第３弾開幕！

A prequel to the blockbuster Attack on Titan series, Before the Fall is a three volume young adult fiction fantasy novel series set years before the events that transpire with Eren and Mikasa. Together, the second and third volumes of Before the Fall are yet another prequel story and they are for the most part separate from the story of Angel and Wall Maria. In this collection we are introduced to a new character Kuklo was found as a baby crying in a mass of Titan vomit, amidst the dead titan corpses. He is called "a child of titan" and is essentially hated by the people inside the walls. Kyklo despite his horrible beginnings and a single-functioning eye also seems to grow unnaturally fast. He parts himself from his past and gambles on the fate of humanity by enlisting in the Survey Corps. This group functions primarily outside of the safety of the walls. And here with his strength and determination Kyklo survives and thrives. But to accomplish this he gets his hands on the Vertical Maneuvering Equipment. Although the gear is still imperfect and causes a troublesome incident for Kyklo, he fights the titans. Whether it is because it is his fate to fight them, or it is because of his past, he fights against them.