A tribute to "Rejuvenation", using the settings in the movie. Nagi grows normally (from young to old), and Rei-oh grows in the opposite direction (from old to young). King Ling's growth rate is different from that of ordinary people, so he will make appropriate adjustments in order to drive (seeming age difference). Nagi and Reiou's parent images are fabricated. The title identifies the age group Ling Wang appears to be.
Intention: You have witnessed my best moments, but you cannot accompany me until the end of my life. It doesn't matter, we will always be together, no matter what form.