"Only My Railgun" is the first single by
fripSide to feature
Yoshino Nanjō as its new lead
vocalist since her joining in August 2009. Nanjō described it as having the "electric elements" of science and "fantastic elements" of magic, while Satoshi Yaginuma felt that it was a "difficult song" with a "fast
pitch and high
keys". 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. The
tempo was revealed to have 130 beats per minute (BPM). As for the coupling song "Late in Autumn", Nanjō felt that it was "bright" enough to make its lyrics "sadder", while Yaginuma described it as the "standard song for the new fripSide". The song was included in the 2020 smartphone game
D4DJ Groovy Mix on April 4, 2022. ==Track listing==