Not sure if this is the right place to post. I came across what I think is promotional art for a Nico Nico cafe with Rin and Len.

I really like the art style in this and want to see the actual image in better quality but I can't find the original anywhere. Does anyone know if this picture is on Pixiv or Piapro, ect? Or even who the artist is?

I really like the art style in this and want to see the actual image in better quality but I can't find the original anywhere. Does anyone know if this picture is on Pixiv or Piapro, ect? Or even who the artist is?