On chromecast start screen there is a screenshot of drama that has subtitle “Thank you for keeping your promise”. What drama is tha from?
The drama is I hear your voice (scene from ep 12): https://www.viki.com/tv/12147c-i-hear-your-voice?q=I%20hear%20your
Found it here: https://www.reddit.com/r/KDRAMA/comments/3wpqdi/thank_you_for_keeping_your_promise/
Apparently, people asked themselves the same question xd