Have you all read the synopsis and you're feeling uncomfortable because of the age gap? Don't let that cause you to miss on a truly amazing series with excellent acting from the cast, hard work from everyone clearly seen in every scene, and a story that is well written. Also with mature/seasoned (lol very funny bro moments/interactions) male leads! I only gave it a 9, story wise, because of the unfortunate and uncomfortable part of the age gap of the primary couple in the story - 18 going on 19 and 939 (30s-40s male in appearance). The age gap makes it uncomfortable, but I won't give a horrible rating just because it makes me uncomfortable, especially when everyone worked hard to produce such a fantastic series. You see that, as you get to know the characters, there's nothing disturbing or corrupted going on between them. The lead characters Kim Shin (Gong Yoo/Gong Ji Cheol) & Ji Eun Tak (Kim Go Eun) are very respectful of each other, with adorable moments that make you fall in love with them. With this series, I'm pleased to see that although the secondary couple of the Grim Reaper/Kim Woo Bin/Adult Wang Yeo (Lee Dong Wook) & Sunny aka Kim Seon/Kim Sun (Yoo In Na) meet with tragedy, they are not forgotten.

At the start of watching this I had to keep reminding myself I was still on episode 1 or 2 as the story got deeper, the characters more real/solid and the drama intensified. Be prepared to be taken on an emotional roller coaster where just as soon as you find yourself crying, you're laughing in the next moment. These actors are incredible! I was hoping there was a season 2 before the end of episode 1. It's so enjoyable, I didn't even realize each episode is 70+ mins long, which I'm grateful for because I just don't want it to end. Also, did anyone see the goblin & reaper design on the pillows/rolled towels in episode 4? Nuggets like that make watching so fun. I'm in love <3 Also actors
Kim Byung Chul (Park Joong Hun [Goryeo eunuch]) and Jo Woo Jin(Kim Do Young [Yoo Shin Woo's secretary] ) favor each other so much I thought there was one actor playing both roles!

Episode 6 when Grim said I love you & Goblin's reaction as well as in episode 7 with the scary movie, those are unforgettable scenes lol Then Episode 11... man all of them!! I cried nearly every episode... The ending brought everything full circle, with all that wonderful, heart-wrenching, tear jerking, suspense filled moments coming to a cheesy but sweet end for the secondary couple and solid start for the primary couple. Though with the primary couple this, unfortunately, brought back the issue of the age gap. I was so happy to see them together but disappointed that the school girl with the a much older man concept came back. Why couldn't they have arranged for them to meet after she finished college? Also, it left us wondering about how things turned out for Yoo Deok Hwa (Yook Sung Jae).

So try not to let the age gap cause you to miss out on a great series!