"LUCA" (Last Universal Common Ancestor) is based on Charles Darwin's proposition that all species of life have descended over time from common ancestors.

The story of a grim reaper who gets erased from the memories of the world for breaking the rules of heaven and falling in love with a mortal woman after inhabiting a human body.

Lee Jae-in (Ha Seok-jin), a ruthless son from a wealthy family starts seeing an elementary school teacher, Kim Da-hyun (Jeon So-min) whom he has never seen before, on a six-month contract engagement, so that he could inherit the asset as written on his grandfather’s will. '1% of Anything' is a romance drama depicting what happens to the pair during the fake engagement.