The drama is about a man who commits suicide... Once you read this you'd think that it's a gloomy depressing drama...but it isn't! As the name says "A Bittersweet Life" this drama might have a bitter sad moments but it's full of sweet moments too! The main lead is a mysterious man...he could be sweet and cute as a little puppy in one sec...then he turns to a crazy maniac the following sec just as the other title indicates "Demons Living In My Body"....I think LDW did his best in this role... his character is what ties the 3 other leads together! the drama gives equal time to all the 4 characters to tell their story... All the actors did great in portraying their characters! The OST is amazing...all the parts are touching and fit with the drama! I'll definitely re-watch my favorite scenes from time to time! Finally: this is an unusual drama in all aspects...I highly recommend it for those bored with the normal cliches!