Women's Prison - Mia and Seline (first part) (Pixiv Fanbox)

Prisoners Mia and Seline are bitter rivals, so the guards have devised a way to help them resolve their differences. Mia and Seline have been placed on toilet duty in the same stall, where they must each try to drink more urine than the other over the course of 24 hours. Whoever wins will have proven herself to be a superior woman. (The next pages will be in a color manga style, but I wanted to render the first one like with the Celia's Probation scenes). (And yeah, I guess Seline has a similar name to Celia. It's a big prison so there's bound to be some overlap...)