I don't think Oshida is cosplaying as Asparagus in this. I think that the artist just think that if ever Andou and Oshida were the representation of the BC Faction(Andou is wearing their uniform) and Freedom faction(Oshida is wearing their uniform) from the Ribbon Warrior version as opposed to the anime version of the Escalator and Examination side of BC Freedom students.

Also, Asparagus and Bordeaux are in the upper right corner of the image.

zenjamibu said:

I don't think Oshida is cosplaying as Asparagus in this.

The thing that tipped the scales for me on that is the blue jacket on the shoulders, thinking that's an eccentric thing that only a single character would do. But then I looked again, and saw that Moules also wears her uniform like that, so... :/

By the emperor