Lee SoHwa is a crime and mystery blogger. She writes her own stories and writes about real life crime cases that she had a privilege to work on. 

One day, she gets a call from the Seoul Police Station, asking her if she would like to become an investigator, despite her not having any proper training. Of course, she said yes. 

She was put into a team of seven men, who were nicknamed BTS. 

Something about them wasn't very normal. They were different. Different not from just every team at the police station, but also from people. They were inhumanly handsome and always seemed to be a step ahead in investigations. 

"Just what exactly are you all?"

"The 'bulletproof' in bulletproof boys does have a double meaning."