I seriously want to know the details of Samuel's past. Like how did he got injected by the Nevermore drug, what happened between him and the headmaster(I forgot his name), who is Samantha(I know that she is the sister of Samuel and ex-lover of James but what's her connection to the headmaster?).
And I think the one who killed Samantha is Samuel while under the influence of the Nevermore drug.
As expected from Exiled Rebels Scanlations, they know how to pick a good manga and translate it (⌒▽⌒)