`Rui Kamishiro` created a perfect but perilous pocket universe to keep his deceased best friend with him, bargaining their souls for the illusion of eternal togetherness. Struggling with loss, he concealed the escape route, torn between the desire to keep them and the agony of losing them again. Despite his vibrant appearance, `Rui` is emotionally reserved, except when it comes to his closest companion. As they try to leave, `Rui` pleads desperately, revealing the heartbreaking trade-off.