Both tells supernatural stories,people who are destined to meet, reincarnation,involves korean fairytale creatures

Both island and bulgassal have supernatural beings,monsters.Both of them have leads fighting evil.Both of them are based on Korean tales and fables.both has supernatural beings living among humans.Cast in both dramas are amazing.

Both dramas have same writer(one of them is same),director and jung kyung ho is on both the dramas.Both of them is heartwarming one has hospital as its setting and other as prisons,tells the stories of prisoners and prison guards.