Where did it go wrong? Sweet & Sour Synopsis: Faced with real-world opportunities and challenges, a couple endures the highs and lows of trying to make a long-distance relationship survive. Jang Hyuk (Jang Ki Yong) is a man who wants to have both work and love with his girlfriend Da Eun (Chae Soo Bin), and Bo Young (Krystal Jung) is a woman he meets in a new environment. It is a refreshing romantic comedy about the complicated relationships between three people who are experiencing different emotions. (Source: MyDramaList)   MAIN CAST Jang Ki-yong as Jang-hyuk Chae Soo-bin as Da-eun Krystal…