The Reionics Who Began with Mebius

As a transmigrator from Blue Star who arrived in the Showa Universe, Xingchen planned to make a name for himself using his knowledge of Ultraman TV plots and his identity as a Reionics. But then he discovered that his timeline was set three years before Mebius arrived on Earth. Only after his true identity was fully revealed did he understand the meaning of his existence as the Shadow of Time and Space! A time-loop story + multiple female leads pursuing the male lead + the spirit of Ultraman!