A longer trailer for Gu Family Book has been released! The romance between Lee Yeon Hee and Choi Jin Hyuk has a beautiful but dramatic shadow looming over it, and then the trailer goes to the future where the grown Lee Seung Gi experiences some chemistry of his own with Suzy's character. Check out the longer preview that has netizens buzzing to have it on their list of must-watch dramas: If you were wavering about watching this drama, are you sold now?