* The Knite contest, which brought forth much silly crossovers and randomness, as well as a FountainOfMemes. If the angst of the real thing ever gets to you, read the entries from yuumei's favourites page.
* Author comments, especially on the beta pages
* Chapter One Omake. Kai tries to cheer Sen up by offering to buy ice-cream. Sen refuses, saying "don't try to bribe me!" In Chapter Two after Kai has convinced Sen to come to school, they are both eating ice-cream.
* Sen on Fei: "That woman was...so terrifying..."
* Chapter 2 bonus: Sen's infamous [[MemeticMutation facebooking]] of Kai.
* The 'childish' fight of Sen and Kai after Sen's HitMeDammit moment. The author's comment takes it up to eleven.