N/A large black bag with straps, and ink-stained interior

Large black bag with a logo for Modern Red Schoolhouse on the side. Its large, around 15 inches long by 12 inches tall by 3 inches thick, with a pair of short handle straps, as well as a long shoulder strap. Both the roomy side pocket and the larger pocket have zippers. Has a glossy dark stain inside the smaller pocket, and red (gel pen, I think) ink stains in the bottom of the main pocket.