I tried to watch it because Lee Je Hoon and the ratings, but I think it's not that "masterpiece"?
I expect to cry at every episode but nope, the feel just stops at "awww so sad".

The first episode is 10/10 tho. The scenes when Jung-Woo helps the deceased's family and Geu-Ru's reactions when his father did not come back are really tear-jerking.

But idk what happen after that... The story becomes so-so...?
The story is good, but some plots felt forced. But the story when they focus on the main characters is heartwarming. I was hoping the story will focus more on the job, but nah, so many unnecessary additions. Sometimes they forced the romances too (not the one with Na-Mu, trust me Na-Mu is a really cute and caring childhood friend, her mom is annoying tho.)

For the acting and the characters, I really like Geu-Ru's Father. Damn, he should be still alive and be the main character. His character is sooo good. Ji Jin Hee's acting is perfect. Lee Je Hoon did a good job too. I usually love his character at first sight but this one is nope LOL, like what they intend, a trash uncle. The uncle really annoying at first but we can see that he slowly caring for his nephew. Some people hate Na-Mu but I think it's understandable why she care so much to Geu-Ru. And Tang Jun Sang as Geu-Ru? He portrayed an Asperger character really well, sometimes I thought it was not acting because it felt so real.

The music/ost is so-so. Not memorable, and it was just classic music pianos.

TLDR: it's a good tv series but I can't say it's a perfect 10/10. It's felt so messy that I hope they didn't add too many problems with the characters.