u/kravleged

Hi I’m a totally new watch owner and just ordered this silly watch from eBay. It needs a battery change, but my problem is that I don’t know how to remove this thing on the back, protecting the battery. There are no notches or screws like all the tutorials I’ve watched has. I’m at a loss on what to do and if it’s even possible to change the battery
Hope anyone can help :)
And if more pictures are needed, feel free to ask