http://mikuru.tw/wordpress/archives/2082 曲調激勵人心,象徵對抗暴政的曲目,對我而言這如同 ACG 界的革命練習曲! This song is in memorial of "Sunflower Student Movement," March 2014, Taiwan. For me, it is "Revolutionary Etude of ACG community."
http://www.nicovideo.jp/watch/sm23205437