The fallen angel who was given a second chance to be an angel back . But with one condition, he must make some one that the deity chose to fall in love . One day , before knowing who the girl is , he went to a park where the chosen one at . He saw the girl's ability and beauty. She has an ability where she can make flowers bloom . She went to a bench near a big tree and sat there . No one can see The Fallen Angel except his senior and the other residents of Heaven and Hell . From there , love story of a fallen angel with an immortal human began .