[y/n] is an aspiring sport psychologist. In a sense, it is her way of chasing after her brother, Jinpachi, and longing for his acknowledgment. He was always one step ahead of her, and she was always one step behind. He was the shining star of the family. But to have light, there must be darkness, and that is what she was. But she wants to shine alongside him. As the Blue Lock project is not yet seen as a sure method of bringing the World Cup to Japan, funds are low. Therefore, Jinpachi seeks out his younger sister, [y/n] to work at the Blue Lock campus under the guise of an internship to keep costs low. While he sees her as an expendable tool, [y/n] sees this as an opportunity to showcase her potential in the field of sports psychology. But would being in an environment surrounded by boys her age be okay? Surely not!