ColorGirls《The Seine Group ChuDao WuZhouNian JiNian YanChangHui》
20180202
https://www.youtube.com/watch?v=GROURi_86AE

Long before this event was held, the original member,沉因,
had already left The Seine Group.
She was officially placed on indefinite hiatus on April 18, 2017.

That makes this bittersweet kind of 神曲 even more bittersweet.