Dr.Serah is a Scientist from the future. due to a technical fault in her time machine, she had to go back 100 years back in time... there she met BTS as rookies. she did something she shouldn't. as a result, she stuck between time and space forever. if you want to know what she did.. you have to read the story. Fact. I wrote this story 1st of June 2019. but with the time somethings become real... I mean the things I said in the ff. still IDK how.