Given the artist's commentary and the outfit, I think there's a high chance that this could be Jacket Girl on the cover of Dolls in Pseudo Paradise. However I cannot be completely sure since her outfit also closely resembles Elly's as well.

SomeDudeWithRice said:

Given the artist's commentary and the outfit, I think there's a high chance that this could be Jacket Girl on the cover of Dolls in Pseudo Paradise. However I cannot be completely sure since her outfit also closely resembles Elly's as well.

It is Jacket Girl. The hat tells it for me.