永遠なる四銃士

永遠なる四銃士 is a upbeat song by 結城若葉(CV:内山夕実) with a tempo of 140 BPM. It can also be used half-time at 70 BPM or double-time at 280 BPM. The track runs 4 minutes and 15 seconds long with a F♯/G♭ key and a major mode. It has high energy and is somewhat danceable with a time signature of 4 beats per bar .