Who Are You Mister?

It is a story about a girl called Jisoo. One day she encountered one spirit guy who needed her help in how he became a spirit. In return, he helped her to get nearer to her crush. However, as time go by, Jisoo and the spirit formed bond. Jisoo found herself liking him although he was spirit.... How will story continue. ..Who is this spirit man...will she able to find out about him?