"Butter-Fly" is a song recorded by Japanese singer Kōji Wada as the opening theme song to Digimon Adventure. The song was released as Wada's debut single on April 23, 1999. Wikipedia
Composer: Hidenori Chiwata
B-side: "Seven"; "Seven" (10th Memorial Version; Strong Version)
Genre: J-pop, anison
Label: Interchannel
Released: April 23, 1999