「"That means you have 13 days to live," Said the demon. "If you don't purify yourself, I'll drag your soul down to hell."」
Hana has to live her remaining days with a very seductive demon and a very sweet angel. As a human, she must not fall in love with emortal creatures, yet it's difficult when they treat her with kindness and love. If she falls for the demon, she goes to hell. If she falls for the angel, she goes to heaven. But, if they both fall for her, they would be in big trouble.
What happens after death? Hana was always told that hell was horrible. But she was not expecting what she found, definitely not a staircase that went to heaven. She filled in love with two men. One from hell and the other from heaven. She was not expecting that she would have to save hell and heaven from the man she once loved. Maybe that man is not what he seems.