[Oshi No Ko], Vol. 2Ten years after the murder of pop idol Ai Hoshino, her young (and unusually mature) twins are now poised to enter high school. While her death has had a profound effect on the children, its manifested in polar opposite ways. Ruby is determined to follow in her mothers footsteps and become an idol, but Aqua has no desire to stand in the spotlight. Instead, he works behind the scenes in the entertainment industry, all while harboring an ulterior motive: