"Koi wa Sensou" is a rock-genre song about how Miku will fight to attain her crush, who is in love with someone else. Miku declares that "love is war" and that in the end, she will make her love see only her. "Koi wa Sensou" is one Miku's older hits and has covers featuring almost every official VOCALOID. Due to the song's popularity, it has been translated many times into various languages by different translators. Additionally, it was the eighth song to enter the Hall of Legend, on November 4, 2008.