HAHAHAHAHAHAHAHAHAHAHA!!!!!!!! XD
Spoiler for Kohaku's route:
Chaos and SHIKI hanging out, drinking coffee like old buddies is probably one the funniest mood whiplashes I have ever come across. Oh God that was so random and brilliant.
But frankly I didn't think this route was anything spectacular. Kohaku as a tragic figure at Hisui's True End was much more of an impact than anything in Kohaku's actual route.