Love that can defeat hate

"pain? do you even know pain?!"
"you don't know pain until you crave a conversation with someone who is no longer alive"
the boy replied "its not like your alive"
"huh?"
"you DIED Seol ah the next minute you saw them die you died."
"and from then every time you wished to die you needed love , you needed happiness , you needed life because death could'nt give you that"

Two kids searching for their lost love in two different ways with the help of angels with the opposition of demons . Who will win? will they be able to find their love ? or will they be lost too?