Legend has it that a long time ago, God had a beautiful little daughter who left two tears while helping mortals. God asked her to search for her tears in the world. When she found the tears, all the magic power would return to her. She must find it before her 18th birthday. Otherwise, she would die in the first second after her birthday. She would start reincarnation all over again and search again. If she couldn't find it, she would die at the age of 18. Repeat this until she finds her tears.