A mecha otaku is reincarnated into another world as Ernesti Echevalier, also known as Eru. In this world exists huge humanoid weapons known as Silhouette Knights. Dreaming of piloting those robots, Eru, with childhood friends, Archid Walter and Adeltrud Walter, aim to become Knight Runners, pilots of these Silhouette Knights.
The main cast
Rie TAKAHASH as Ernesti "Eru" Echevarria, a talented programmer in his previous life, now reincarnated into a fantasy world. He uses his knowledge to the fullest in an effort to make his own ideal Silhouette Knight.
Ayaka OHASHI as Adeltroot "Adi" Alter, Eru's childhood friend. She has a weakness for cute things, and always hugs Eru as if he were a stuffed toy. Kid is her twin brother
Shinsuke SUGAWARA as Akidd "Kid" Alter, Eru's childhood friend. He learned magic from Eru when they were children, and he has grown in power and combat ability ever since. Adi is his twin sister.