Fairly certain this is kan'u, any second opinions? The front part that hangs below the skirt is missing. Do any other koihime musou characters wear a black skirt?

Picnic, I bow down to you. You're correct.

The image is from this Koihime Musou-themed doujin CG set (converted from .bmp to .jpg):

• Real Opanchu 5: http://www.dlsite.com/ecchi-eng/work/=/product_id/RE095781.html

And the original filename is: pa05_aisya.bmp