For me it is the best of the best ever , the male and female lead both are strong . And of course Jang Ki Young's character , Kim Soo Hyeon is my favourite character . He is very kind , and he care and protect the kid Kang Seul Gi , he also still care for his friend Philip even though sometimes he kinda annoying hehe , but Philip care and always help Soo Hyeon too . One more thing is that , Soohyun really good in fighting and shooting , that head shoot tho ugh just love it !! This drama is just really good , MASTERPIECE !! This is my firt time to watch Nana acting , she really pretty and her acting is good and satisfying too ! Still cant move on with the ending , but the ending can be consider as a happy ending :) I LOVE THIS DRAMA , ALL TIME FAVOURITE . Its really worth watching , you guys wont be disappointed . Give it a try !!