Between Us Special is just a filler until they can film the series that was pushed back due to Covid-19.

~~ STORY ~~

There is no real story. It is only cute clips between Team and Win showing off some aspects of their daily lives.
I would go as far as saying that this is more for Boun and Prem fans than anything else. They try to keep with the UWMA characters, but it's just fan service episodes more than anything. There is no plot to it.

Also, since I just came to watch the specials after rewatching UWMA, I noticed that Win and Team are a little different from their UWMA counter parts. Yes, they don't have any big changes to their characters, but I found that the specials really made Team look stupid when in UWMA he wasn't really stupid. I don't remember Team being stupid, he was very intelligent and awkward more than anything. Win wasn't too different, but he did have some changes. I noticed Win's teasing of Team was a little too playful and maybe even mean compared to UWMA. Win's style of teasing was very flirty in UWMA and he was never mean to Team.

On a side note, I read other reviews going on about Win kicking Team off the bed, and about him teasing Team for gaining weight... Just stop. We don't need the moral police here. Yes, Win shouldn't have done either, but who hasn't been pushed off the bed or teased about their weight by their friends or family? It's very realistic. Also, it's just a one-off thing that Win does, so stop going on about it as if he's abusing Team or something.

~~ Overall ~~

Between Us Special was a fun watch. It does the job of making us want to see more of Team and Win while their series is delayed. That being said, I don't think I will rewatch this any time soon. I prefer plot driven storylines and since this is more fanservice than plot, I wasn't a fan. It's very cute and a great one time watch between UWMA and Between Us the series. I can't wait to watch them together again soon.