SS501's Heo Young Saeng dedicated his emotional, veteran vocals for OST Part.6 of ongoing MBC drama, 'A Pledge to God'. 

Titled "Lie", the OST depicts feelings of false hope that a loved one will return after a painful farewell. The ongoing weekend drama tells the story of two sets of parents who make difficult, almost immoral choices in order to save their dying children. 

Listen to the sorrowful OST above.