恋は戦争 (Koi wa Sensou)

Background
"Koi wa Sensou" is a rock-genre song about 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.

Discography
"Koi was Sensou" is featured on the albums Supercell and Hatsune Miku Best ～impacts～. It was also released as a single.

There is an album dedicated to the song, entitled Eager Love Revenge, with various remixes from some of the most popular producers in to VOCALOID community, including kz, 40meterP, and DECO*27, in addition to ryo himself.

Concerts
This song was performed at the Miku FES'09 Concert.

Publications
This song has appeared as sheet music in the Vocaloid Best selection series and in the ピアノソロ やさしく弾ける supercell BEST collection.