It's been a long time since I charted a 10 stars song!
This was really troublesome to chart because I was not satisfied with most of the results, I actually tried charting this months ago and gave up, but since it got released on ProSeka I decided to give it one last try.
Variant Vocals are available, but you must keep in mind that in the last chorus (where Miku and Len starts singing along) the vocals will not be accurate, because Miku's fast singing is only available for Miku's variant, and Len's is also only available in Len's variant, the others (Rin, Luka, MEIKO, and KAITO) will not have any of the 2 available, so keep that in mind!
Extreme is a Nerfed Version of Ex Extreme.

JINSEI - Our Life - 人生 by Ann-MeltsP
BPM: 185 - 284 (Rin and Len) - 185 (Miku, Luka and MEIKO) - 138.45 (KAITO) - 185
(Keep in mind that KAITO's bpm is also just 185 3/4!)
Vocals: Hatsune Miku - Kagamine Rin - Kagamine Len - Megurine Luka - MEIKO - KAITO
Chart by AegbGo