This chart was made along with 3 other charts of Project Sekai Colorful Stage, aka all Shinonome Ena focus songs for her anniversary!

Infinitely Gray - Close to Gray - Kagirinaku Haiiro e - 限りなく灰色へ by Surii
Vocals: Kagamine Len
Sekai Variant: Nightcord at 25 am + Kagamine Rin
Chart by AegbGo