I've decided to watch this for two reasons: I love web dramas and I used to have a beautiful relationship with my grandpa, so I knew I'd love this.
And I can confirm it! You can see how much he cares for his granddaughter, even if they're been apart for a very long time. I bet they missed each other, you can see it because he kept her photos in his house, I almost cried on that moment. If you're down for some sweet family moments, you're on the right page.
In the first episode I wasn't very convinced about continuing, mainly because I couldn't stand Eun Jae's attitude; anyway, a few episode later, I started liking her.
Yuna is a good actress, and I'm looking forward for some other web dramas with her! The grandpa is so sweet and also badass, so you'll never get bored if he is on-scren. You can easily watch it on v-live and naver with ENG SUB, that's awesome.