Kyon: Big Damn Hero/YMMV

"Nonoko: (excitedly) What's going on? More undercover work?"
 * Accidental Innuendo: In Calm Before the Storm, Chapter 3, after Nonoko discovers.

"Masao: (To Kyon) But you look a capable sort. Ambitious, too. It takes a strong man to keep two women, doesn't it?" Tsuruya: My guy is totally cool enough to handle, like, way more than that, you know. Yuki: *nods*"
 * Come for the X, Stay for the Y: Come for the trope references and being advertised as a TV Tropes crossover, stay for the character interactions, the fighting scenes and the Reconstruction of the harem plot.
 * Creator Worship: Oh, yeah...
 * Hilarious in Hindsight:
 * In The Obligatory Anachronic Order Explanation Arc Chapter 1 Kyon tells Ryoko that she is the most reasonable person to ever try to kill him but that he remembers that time she stabbed him all too well. This becomes hilarious later on when we learn
 * This conversation from the fifth chapter of the Heroic Antic Begins arc becomes suddenly funnier when you realize.

""...but I digress. When you get that feeling, you know the one, in the back of your head? The one that makes you think something is off about the situation? It may be right. Granted, you may also be tumbling headlong into a fit of paranoia that will end terribly for you and everyone you love. ...""
 * Les Yay:
 * Yuki and Mikuru, even more so than in the original.
 * Durandall in general doesn't shy away from Haruhi's bisexuality; she gets flustered when she is offered a chance to get better at kissing, and even more so when.
 * Tsuruya and Mikuru, too, although it could be argued that's more Like Sisters.
 * Reread Bonus: Anyone who knows a lot about Higurashi no Naku Koro ni can find subtle references to it in almost every chapter, not including the fact that it does crossover with Higurashi necessarily. For example, right off the bat we have the prologue's Fictional Document referencing the Hate Plague.