I'm writing this as I'm watching it so I don't forget to write anything. I'm just gonna go over the general idea of both these episodes. Great series btw, definitely watch it if you havent. You kinda have to anyway to watch these, so... yeah.
First episode: Very filler-y and fanservice-y. Quite entertaining, though. Obviously there's no plot movement or anything special besides the fanservice, but you can't expect much from 2 extra episodes. Lets just say that the ending of this episode is pretty predictable, nonetheless funny :P
Second episode: Some other random story that doesnt really matter, but still entertaining. This one is more fight-based, so when you put the two episodes together, you really get the whole package.
All in all, you can think of these as Sumomomo in two episodes. They've got the fanservice, the fighting, the assassins, the complicated/funny love web things, and especially, the humor and enjoyment. Definitely take the time to watch these if you've seen the anime.
