I personally feel that this is the best chapter of this manga so far, with the revelation being an excellent explanation to the event that started this all while also highlighting the fact that this isn't some random gag manga with no plot (but lots of PLOT).
Well TBH I already suspected that Shion had died too easily, but thanks for the confirmation. Now , all that thing of Touka being all manly and hero-like ... well, that caught me by surprise