Every story has to start somewhere. And ATEEZ's story begins on a beach with a boy. From one unlikely home to the next, each page of Hongjoong's life comes together and the pieces fall into place for the origin of the group built from nothing.

Little Mingi's life is always an adventure, only without the actual dangerous parts. That is, until he comes to a mysterious town and meets a mysterious person who will turn everything he thought he knew on its head and make him question even himself.

Seonghwa knows who he is. Or at least, he thinks he does. He convinces himself no amount of digging up the past can help him with his future, but leaving it all behind quickly becomes harder than he thought.

Jongho's life is already hell, so when he finally runs away from it, he figures it can't get much worse. It only takes him a freak storm, a mysterious cave, and a strange group of mermaids and pirates for him to realise he may have been wrong.

Newly orphaned Yunho and his younger brother Gunho navigate life in the orphanage and on the streets with the modest goal of survival driving them forward. With the promise of harsh winter and the threat of separation looming, what Yunho thought was the end of his life turns out to be the beginning.

San's life has been chaos as long as he can remember, but the path of his life has always been set- until one day, it isn't. His ability to think on his feet and adapt is suddenly tested and only by overcoming the odds will he set sail from his little home island.

Twelve-year-old Yeosang knows how to roll with the punches and keep from ruffling too many feathers. However, a moment of truth to determine his future hangs on his ability to stand against a seemingly unstoppable force.

Wooyoung's world has two sides; the Navy and everyone else. Good and evil. Dark and light. But suddenly Wooyoung is thrown into a life he never asked for and the world is thrown into grayscale. Wooyoung's got the next move.