The synopsis alone had me hooked and this didn't disappoint. I think it would have done really well as a longer series with more time to really explore his mother's disappearance as well as Yoo Han's life. Personally, I find that the first two episodes are absolutely flawless. The show as a whole isn't perfect but it's still really good and probably the best it could be for such a short series. They got me twice with twists and I loved it.
Yoo Han turns up and I'm like "woah this guy is cool" but then he turns out to be such a gentle soul and a sweetheart, I'm swooning.
The soundtrack, especially the music during Yeon Woo's color rush is so good and such a perfect fit for the aesthetic they went with, which is also really gorgeous.