Clearly, at this point, narrative logic ceased to exist. It went off to have tea with Nana while the writers decided that Aya (fuck you, Aya) should remain the emotional centre of a team that doesn't even know him, leading teenagers from random backgrounds in a spin-off with a boy band name and an operational structure that feels more like an extracurricular activity than a clandestine organization.
Ken, on the other hand, is there for reasons that can only be explained as: "someone's gotta cook." Literally. And because they didn't have the heart to leave him out, although no one seems to remember why he's so emotionally screwed.
And so… Weiß Side B was what happened when there were no more sober writers in the building.
Enjoyed this more than the first one, possibly because at least here noone was running around wearing those exceedingly silly masks. Also because I don't (yet...?) care overly much for most of the new team members and this one didn't feature them much, being a continuation of the flashback begun in the first volume showing how Aya met Yuki (who seems the least annoying of the new bunch so far) in New York and ended up coming to London to join KB.