One of my favorite Mirai songs.

ハロ／ハワユ
Romanized/In English: Hello/How Are You
Artist/Composer: Hoehoe-P (a.k.a. Nanou)
Vocals: Hatsune Miku, GUMI
Illustration: mztm
Video: Hotalsou

Difficulties and Style:
Extreme - 9.5 - Mixed
Hard - 7 - Arcade
Normal - 4.5 - Arcade

Charter:
JoldNoteC

Sources:
Video:
https://www.youtube.com/watch?v=yUi0gX3fUbw
Hatsune Miku - Hello/Howareyou (ハロ／ハワユ)
vgperson
Info/Preview/Background: https://vocaloid.fandom.com/wiki/%E3%83%8F%E3%83%AD%EF%BC%8F%E3%83%8F%E3%83%AF%E3%83%A6_(Hello/How_Are_You)

Alternate Videos:
Project SEKAI - 25-ji, Nightcord de.
https://www.youtube.com/watch?v=e2qALRkYdg8
[FULL VER] ハロ／ハワユ (Hello/How Are You) / 25時、ナイトコードで。 × 初音ミク歌詞 Color Coded Lyrics プロセカ
_zui_