"Only My Railgun" is the first single by fripSide to feature Yoshino Nanjō as its new lead vocalist since her joining in August 2009.

He cited his fondness of Western hard rock music when composing the song to achieve a native singing speed and rhythm with two or three syllables in every note.

[5] All music is composed by Satoshi YaginumaThe single's limited edition is bundled with a DVD and was also released on November 4, 2009.

[7] The song has been certified Gold by the Recording Industry Association of Japan for both physical and streaming department.

[9] Machico did a cover version of "Only My Railgun" song, which became available on iTunes Store on December 10, 2014, as part of her second album COLORS II -RML- that was released in April 2015.