At a Distance, Spring is Green. My first thoughts? The poster looked like something from a 2010's show, which isn't bad but seeing a yellow haired male lead made me just not like Park Ji Hoon's (Yeo Joon's) look at all. But, I started liking his look later on in the show.
Just a note, I have never saw the webtoon before so this is solely based on the drama itself.

CHARACTERS/STORY
MALE LEADS
Yeo Joon and his family were brought into the limelight in starting episodes, but after that, where are they? Yeo Joon's current family problems are faded into the background after introducing it one episode, and we just kept getting flashbacks. Until they decided to bring back his family problems second to last episode. Beside his family problems, Yeo Joon isn't that bad of a character.

Soo Hyun, not bad either but not my favorite. Soo Hyun starts warming up to Yeo Joon the last minute, having some/barely any scenes with them. I just don't really know what to talk about him.

Chan Ki, boring! And they at least try to redeem his character soon in the story, He barely gets screen time. And if he does, sure he has his haha moments but that's it.

FEMALE LEADS
So Bin, not gonna lie, after seeing Kang Min Ah in True Beauty I was pretty excited she'll get her own main role, but her character's a bore. Don't get me wrong, it's not like she's just standing their all episodes but she's just a bore? Too nice maybe? She does have a backstory to her past but that's only for 1-2 episodes in the middle of the show.

Mi-joo, boring. I won't lie, her character COULD'VE been better with some screen time and development, we barely know anything about her to even declare if she's good or not. Only thing I know is that she has good fashion sense. She also had to many scenes "drooling" over Soo-hyun. But I'll give props to screenwriters for not making her some cocky rich girl as I thought she would've been.

Young Ran, maybe the most interesting? But not really also because lack of screen time, all we know is that she's Soo-hyun's longest friend, she's strong physically, and that's about it.

SOBIN AND YEO JUN'S ROMANCE
I personally think they're romance was pretty cute but took too much screen time to develop most characters. Talking about you the most Mi-joo.

SOO HYUN'S LOVE TRIANGLE
What an annoying triangle I've ever seen. One is to scared to admit their feelings and the other one get's too hook up on Soo-hyun thinking they know everything about him while barely having any interactions with him.

SOO HYUN AND YEO JOON'S BROMANCE/FRIENDSHIP
Love, love, LOVEEE! IT! I recommend you stay to watch these two if you don't like the romance part, although some episode they barely get any scenes at all with each other.

ACTING
The acting was great! Not enough to give a 10 though but great!

MUSIC
Loved! I mostly have a lot of them on my playlist.

WILL I REWATCH?
Specific episodes only.

SUMMARY!!
This show was amazing at first to me, what was missing was character development/likability in a lot of characters, wasted scenes with So-bin and Yeo Jun's romance, Soo-hyun's stupid love triangle, and again. WASTED SCENES! Although my rating isn't that high I do recommend that you check this out as it only has 12 episodes, I think it should've had 16 or just more time duration!
They're other things I would've talked about like Mi-joo and Soo-hyun's interactions, Jun-wan and Yeo Joon and more but I think you'll make your own opinion on those once you choose to watch it or not.