God that was awful. Especially the ending. Not only is the "Sisters" plot point come out of nowhere, but it turns it into a bizarre soap opera where I guess we're supposed to care about the actions of an absolutely terrible human being and completely change what we thought about literally all the major characters for no reason. They don't even explain the killing game, just this vague handwave of it being a government thing, as if A YEARLY KILLING GAME WITH MIDDLE SCHOOL GIRLS is supposed to be just ignored. By the end, it seems like no one even cared about the deaths, which makes the killing game itself utterly pointless.