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?
Shouldn't you take it easy 
a little longer, though?
لكن ألا يجب أن تهوّن على نفسك أكثر؟
Aber solltest du dir nicht
noch etwas Ruhe gönnen?
Pero ¿no deberías tomarte
las cosas con más calma?
Pero ¿no deberías tomarte
las cosas con más calma?
Mais je pense que tu devrais
te reposer encore un peu.
Ma non sarebbe meglio che riposassi un altro po', Yu?
Mas acho que era melhor você
descansar mais, Yu-chan.
Но, Ю, не лучше ли тебе
немного отдохнуть?