Is my hint for 1. Correct, the actress pictured is here, Yang Zi?
https://www.viki.com/v1/celebrities/18276pr-yang-zi
Ha-ha! Episode 22, clinches my clue, and I name it, 
1! The Oath of Love!
That’s the same one I am thinking too! I bet you it is! !Doom at Your Service | Watch with English Subtitles & More | Viki How do I know, I based it off the discussions that took place while it aired, and fans were going bonkers over watching. 
See for yourself, this post had the wall.
Who is Watching "Doom At Your Service"?💜 DATE WITH DOOM! - #309 by kdrama2020ali
@natyh,
Someone got it already, @jomyeong answered.
!Guess the drama by seeing the picture.It's really fun - #216 by jomyeong