Up for sale is a Cospa Cobra Girls Short-Sleeve Sweatshirt in Black and Medium.
I'm pretty sure the 99 on the back is a double-entendre. It's related to the series, but also dates it 1999.
It's not a very well-known series in the US, but it's certainly a very unique sweater.
It's still in very good condition, with little signs of wear.
Tagged a medium, but it fits pretty small. I'd say a usual Small would like the fit. Keep in mind, this was when Otakus had the reputation of being super skinny & frail, no sunlight so the sizing kind of reflects that.
Pretty rare sweatshirt you're not going to see too often.
Let me know if you have any questions or concerns.
Thanks for your time.