Bloodlines of the Broken Kingdom

A kingdom called Mirai once stood strong, with twin heirs who bring a bright future ahead. But they did not agree on one of them ruling alone, Setsuko and Suiko Aikyou Keimachi. They fought for their share of land and eventually splitted Mirai into the northern and southern part, seperated by a tall, wooden gate built to split their people and mark their border. Setsuko and Suiko each took a family name, which resulted in thier children being named Yuki Aikyou, Mizuki Aikyou and Haruka Keimachi. Suiko takes the northern part renamed as Kitamachi, taking the family name, Keimachi. Setsuko takes the southern part renamed as Minamikawa, taking the other family name, Aikyou. Mizuki was born after the war and is oblivious to her kingdom's past, she meets a boy on the other side of the gate. She eventually fell in love after years of talking, but little does she know that the boy she loved, will change her way of seeing Kitamachi for the rest of her life.