CD available in CDJAPAN 
Chapter 6: Bokura no Mirai's ED theme will be "Butterfly", the song will be perform by the 9 Chosen Children, their partner Digimon, along with Ayumi Miyazaki, AiM with Wada Kouji(デジモンアドベンチャー tri. 第6章「ぼくらの未来」エンディングテーマ Butter-Fly～tri.Version～/選ばれし子どもたち、デジモンシンカーズ、宮﨑 歩、AiM with 和田光司)
The song will include previous recorded Wada Kouji-san's voice to sing along with the main cast.
A grand compilation of the main characters and artists gather in one song.
There will be limited(1,481yen) and regular edition(741 Yen) of the CD, it's set to release on May 2nd, 2018.
Limited edition includes paper sleeve cover and a mini poster.
They have yet release the CD cover or preview of the mini poster.