jaehyun, born as jung yoonoh in the busy city of Seoul, in a regular family. he had loving parents that supported every of his more and respected his decisions. his dad was an university professor, that died from a hear attack as a result of his students mocking him when jaehyun was still in primary school. his dad got angry about people not respecting his soft persona and classes, in the end it turned out to be a fatal end of his life. his mother was a nurse, now retired and living in their little house in a village, moving out from the noisy city. enjoying gardening and farming, she got herself a few animals that he's taking of, such as a pig and a few chickens. they became the friends of an old lady that likes to swing in her arm chair in the hot summer days. jaehyun is an only child, no brothers or sisters, even if he was told that his mother lost the first child when she was working at the hospital, shocked by the parents that were brought after a car accident. there was a lot of blood and she couldn't help it but to stress herself.

truth to be told, during high school he was made fun of for being a chubby child, older highschoolers would steal his lunch, and if he tried to protest, he would get beaten by the bullies. it was the main reason jaehyun wanted to become related to military forces, then he decided to stand on the weak people's side and fight against the criminality. working hard on his body, he lost many kilograms, shaping his body perfectly, which was one of the little goals he had. in the academy he learned how to use different tactics and fighting techniques, professional that would be more efficient than the ones he learnt in high school. spending nights of plasticizing shooting and martial arts, jaehyun became one of the best student from his year, and when he graduated he found himself being a FBI forces officer, mainly oriented on the SWAT team.

when he was sent to a mission, no matter what it was, jaehyun was professional enough to turn off his feelings and do his job right, that's why the other SWAT members respected him, just like he respected them. along his cop carrier he got in a lot of trouble, situations that almost ended his life tragically, however he would always fight for another chance to live. his body is fully covered with scars from knives and bullets of different sizes that were printed on his skin forever. somehow, he was proud of each of them because it meant a successful mission, and also a new day to live that he was given from above from the things he and other cops did for humans.

the dating and love experience he has is almost nonexistent, not because he didn't wanted too, but there were many risks he tried to avoid. he mainly limited himself to one night stands, or just paid for his ual satisfaction. he was pretty much afraid of falling with love, because he wouldn't be always there for his beloved one, and something bad can happen all of sudden. for sure causing pain or leaving a broken heart and life behind him was not the best variant for him. there are also other risks, for example a criminal that would want to revenge and attack the one he loved. jaehyun was busy days and nights with his imprevisible work, and who knows how much time he can spend with his lover. his first love happened to be his desk mate in the middle school, when he landed a pencil from the girl and never returned it to her, instead still keeping the item for all the memories and feelings it related to that period of time.

although jaehyun is afraid of being trapped in a dangerous situation if he were to date, he truly hopes that one day will will have children, since babies are one if his weakest spots. little babies that require love and affection, parental love and just the world itself. he wouldn't be against adopting children as well, it's love offering love to those that were never given such fortune.