Tiga World: Let Me Be Nexus?

[No system + small poison in the early stage + transformation of ordinary people] Liu Xiaolei traveled through the world of Ultraman Tiga and became a young genius at the Institute of Ultra-Ancient Civilizations (UACI). I thought I could rely on the plot prophet to live a stable life, but unexpectedly I was selected by Noah's Light at the beginning and became the human body of Ultraman Nexus! However, something seems wrong with this Tiga universe? The Kirialodians dropped a shiny doll that was supposed to belong to the world of Ultraman Galaxy; Ultraman Leo, who was supposed to be sleeping, turned into a fighting master to train him as a devil; the witch Kiranbo from another dimension appeared as scheduled, but the prying eyes of Dark Mephistopheles flashed behind her; even the transparent monster Gadi was parasitized and fused by the alien beast Pedorion! This is a wonderful adventure in which a time traveler takes the light of Nexus and tries to survive in the Tiga world that is gradually going astray, and tries to figure out "who changed the script."