Big Mouth now joins Vincenzo in the category of kDrama thrillers that are incoherent, inconsistent, illogical, and frustrating. Especially frustrating because you see talents such as Lee Jong Suk, Kim Joo-Hun, Kwak Dong-Yeon wasted.

While the primary premise was intriguing, the drama does not progress well. There are so many bizarre plot twists and incomplete plot lines, not to mention how a cancer patient looks NOTHING like a cancer patient and a death that was not necessary.

The reasons I watched it through and did not DNF was a) Lee Jong-Suk's Donald Duck face, b) Yang Kyung-won's excellent turn as the incompetent and unhinged Gong Ji-hoon, and c) to know what would finally happen to Choi Do-Ha.

Will not be recommending this one to anyone, ever.