Out of Time
A human in love with an immortal being. Something the other immortals all laughed at him for. She was his reason and his life. Little does he know he doesn't have all the time to decide to turn her into an immortal with a strong system. She suddenly begins to get sicker, and sicker, and sicker. When he finds out just how long she has, what will he do? Sit there while she suffers? Ease her pain by ending it sooner? Or giving her the life she's always wanted with immortality?
This description based off a roleplay I made. Also, it serves as the back side of a book, how they usually have a description or a piece of the story on it.