sentences:  Bi-wal is also shown to be something more than a human (as he seems to have a great deal of power by killing a nymph to save Dong-young and is also a fiancé of a noble from Hell) and has a hidden agenda regarding Dong-young.Later in the series, Bi-wal is said to be the real King of Hell.Bi-wal and Doung-young knew each other since their childhood, but Dong-young doesn't remember it and the promise they made.