Hey, Why Is This Tiga So Dark and Shiny?

When Yin Xi wakes up in the Ultraman universe as Camilla's younger brother, he thinks he's hit the jackpot—especially after a glitchy system grants him the Dark Sparklence and fuses him with Daigo's Tiga powers. Two transformation forms, ancient mysteries, and semi-invincible strength should make this a cakewalk, right? Wrong. Enemies that never existed in the original timeline keep appearing, and his bond with Camilla is growing dangerously complicated. The ancient ultra-humans may not be as extinct as everyone believes, and this system is far less reliable than advertised.