The entire AMV is pretty much a Houtarou (Hyouka) x Mio (K-On) video but like every scene used is an edited version from another anime. Haven't seen anything this amazing in terms of AMV's in a while. Thought I'd share.
[video=youtube;Qn3Ctatwh78]http://www.youtube.com/watch?v=Qn3Ctatwh78[/video]
Original Youtube Link - http://www.youtube.com/watch?v=Qn3Ctatwh78
Pictures/Image Comparisons
Anime used: K-on!, K-on!!, K-on movie, Hyoka, Kimi ni todoke, Mawaru Penguin Drum, Bakemonogatari, Fate Zero, Toradora, Kurakami, Durara!, Itsuka Tenma no Kuro Usagi, Fuyu no Sonata, ef - a tale of melodies, ef - a tale of memories, Steins;Gate, Hachimitsu to Clover, Kuroshitsuji, Toaru Majutsu no Index, Guilty Crown, Kara no Kyoukai, Karas, Ga-Rei -Zero-, Suzumiya Haruhi no Shoushitsu, Yosuga no Sora, Naruto, Bungaku Shoujo, Kimi Ga Nozomu Eien, Kanon, Angel Beats!, Clannad, Clannad After Story, Kannagi, Croisee in a Foreign Labyrinth ~ The Animation, Black Rock Shooter, Fullmetal Alchemist: Brotherhood, White Album, Nogizaka Haruka no himitsu, Bleach, Another, Inu x Boku SS, original animation.