告白 done! I maintain that I would have finished this much sooner if the POV character would just using so many big words. It’s a pain to go back to the days of looking up a word (or two) every single sentence. >.>; And since it’s physical only modern insta-lookup technology can’t help me… 
Anyway, this is is pretty neat insofar as that, unlike previous short stories that happen at some point during a novel published way back, this one actually takes place during volume 13, chapter 8 if my memory’s not mistaken or @ekg’s notes for that chapter. I think we even have a few direct quotes from Kaito; it’s when he tells the group about his illness and Nigel runs off and Kit follows him. Easy recommended reading sequence at reading it right after finishing vol. 13.
Anyway, our POV this time is Kit. He spends the first half of the story reflecting a bit on his history, which leads into him pondering Kaito’s brilliance and trying to figure out what’s going on there. Hilariously, Kit had circled back to the tried-and-true “he’s a Spanish spy” at one point. XD He was, at one point, convinced that Kaito was some kind of devious super spy or something. 
Apparently it was Vicente’s letting a sick Kaito return back to “enemy” England that’s finally convinced Kit that the spy angle doesn’t work out.
Anyway, Kit tracks Nigel down outside and stops him before he can run off and do something stupid, and convinces him that there’s still things he can do to help with Kaito’s illness (helping carry him around when needed, etc.). Kit also seems to be interested in doing some investigation on his own on tuberculosis; I wonder if that will pan out for anything?
We get a nice dose of KitxNigel in this one, as always. It was a cute story; thank goodness it was so short, all things considered. I can’t imagine reading an entire book/series narrated by Kit; my vocabulary would have to double at that point. 
Just 夜警 left now, which I’m pretty excited about; it’s the bonus story written for the drama CDs. I remember the last one 約束 being pretty cute.