It's one of those obvious subjects, but MAD fan video creator g3penさん has done an impressive job editing, illustrating and animating a Madoka Magica x YuruYuri mash-up.
Previous g3pen work...
Kyuubei ni omakase!
Madoka Magica x RahXephon OP
Toaru Majutsu no Index x Koi to Senkyo to Chocolate OP
Nisemonogatari x Un-Go
Kill me Baby magica
Scott Green is editor and reporter for anime and manga at geek entertainment site Ain't It Cool News. Follow him on Twitter at @aicnanime.