Yejun's life has never been very easy. His mother was very young when she had him, as she was a druggie and ended up alone with a guy at some point, which was how he happened.

     He learned how to take care of himself by the time he was five years old, since he pretty much had to. He found food for not only him, but for his mom, too. In fact, he took care of his mom growing up more than she'd even taken care of him. So he's been very responsible from a very young age.

     By the time he was fourteen he was even more responsible, and he'd do things for neighbors for money so he could get the things that they needed, since his mom had trouble keeping a job and would blow all her money on drugs. When she wasn't high she was sleeping or just sitting around in a solemn, depressive kind of mood.

     He made it his job to make sure that she ate, drank enough water, and took care of herself. He'd bush her hair, even, whenever she would forget to.

     He was also known to stay up until midnight waiting for his mom to get home. Sometimes she came home, other times she didn't. If she didn't make it back by midnight, then he'd go to sleep after worrying himself to sleep. Much to his relief she was always back come morning, then began his daily routine of making sure she was fed and cared for.

     When he was sixteen his mother got pregnant. She got pregnant with a baby girl, but eventually it was found out that she was a drug addict, so after the baby was born, she was taken and placed with a different family. Yejun never got to find out where, however.

     And since it was found out his mom was an addict, he was taken from the home as well and placed in foster care.

     At some point when he was with a foster family, he was out adventuring and exploring. He ended up lost and was out late. He found a cave to take shelter in, and he stayed there. He also found a pool of water in there, and in the cave's ceiling above the water was a hole that exposed the night sky. When he saw the water bubble after the light of the full moon poured into the cave, he touched the water— and fell into it after his foot slipped. The next day he discovered he had the ability to turn into a merman.

     He continued living with his foster family. Something crazy happened, however. One day he woke up, a bloody knife in his hand, and his foster family was scattered around him, dead. They all had multiple stab wounds, and Yejun had blood on him but wasn't wounded.

     He freaked out since he didn't know what was going on, as he couldn't remember. He had no memory whatsoever of the night before. Out of fear, he took off to the sea and he hasn't been home since. He met some other mermen and is now in a small pod of them. Everyone knows his past, but they love him the same— they're fairly certain he wasn't even the one who killed his foster family.