Raizel, protector of the nobles, along with his loyal butler Frankenstein and former Union experiment M-21, continue to spend their days at Ye Ran High School while keeping their true identities secret. They were living their lives as normal until one day, when a violent gang barges onto the school grounds. M-21 is forced to make a choice in order to protect the students. Meanwhile, DA-5, a mysterious special forces team, is dispatched to Japan on an investigative mission. What will become of the trio's peaceful new life?
It appears the memory erasure 
has been a success, Master.
يبدو أنّ مهمّة محو الذّاكرة 
.كلّلت بالنّجاح يا مولاي
Mein Herr, die Löschung der
Erinnerungen hat wohl funktioniert.
El borrado de recuerdos
ha sido todo un éxito, amo.
El borrado de memoria
ha sido todo un éxito, amo.
Il semblerait que leur mémoire
ait été effacée avec succès, maître.
Sembra che la cancellazione dei ricordi
sia riuscita senza problemi, padrone.
Parece que a exclusão de memória
foi feita com sucesso, mestre.
Судя по всему, стирание памяти
прошло успешно, господин.