A story in which a boy is born a prince but befriends a very poor boy. They are inseperable, however one day, the poor boy disappears. What will Jun do?

A story where two bestfriends almost lose each other after the other has a tragic accident. However, this person had a condition from the accident where he keeps losing his memories everytime he makes a new one. Will these two ever survive in their friendship? Or will things turn for the worse?