I found this drama through Zhang Miaoyi (If you don't know her, her recent popular drama of hers is WIFTY.)

I'm familiar with Jun from seventeen too (thanks carat best friend ^^)
So... OF COURSE I HAD TO WATCH THIS DRAMA FULL OF EYE-CANDY ACTORS AND ACTRESSES!

I found their chemistry to be appealing as siblings and lovers. The storyline slowly transitioned the two from the stage of 'childhood friends' to 'lovers' very well. I could notice the small changes in the facial expressions and ways the two leads acted around each other as their relationship progressed from being childhood friends/siblings to having a crush, to falling in love with each other.

The outfits fit the style/time the drama was told. You could tell when there was a time skip and how the two leads grew up together as the world changed around them.

For viewers of this review, the drama is a little slower for relationship progression in the first half until around episode 14. After episode 14, my goodness... There were a lot of kiss scenes... ("Carat friend who is Jun biased, how do you feel?")
They were sweet and the mood was present! The chemistry between the leads was especially prominent!

I'll leave it here since it's hard not to spoil the drama any further!
Viewers who are thinking of watching this drama, give it a go! It's very sweet and light-hearted! Although there are some cringy romantic moments, I found it enjoyable to watch!