NEXUS DXD (ULTRAMAN NEXUS X HIGHSCHOOL DXD)

Ayato Hyoudou, the twin brother of the infamous pervert Issei Hyoudou, lives a relatively normal life at Kuoh Academy. Though often overshadowed by his more outgoing and trouble-prone brother, Ayato has his own close circle of friends. One day, after losing a bet with his friends, he's forced to enter the mysterious and forbidden temple deep in the Kuoh forest, a place surrounded by strange rumors and unexplainable occurrences.

What seemed like a harmless dare turns into a life-altering moment when Ayato stumbles upon a strange artifact in the temple-a glowing silver light that engulfs him. From that moment on, Ayato's life is never the same. He discovers that he has bonded with a powerful extraterrestrial being known as Ultraman Nexus, a guardian of the universe. This being grants Ayato incredible powers, allowing him to transform into a towering silver giant, capable of defending Earth from supernatural threats.

Suddenly, Ayato finds himself thrown into the hidden world of Kuoh City, where angels, devils, and fallen angels clash in an eternal struggle. Alongside dealing with this new reality of mythological beings, Ayato soon learns that Earth's troubles extend far beyond that-alien invaders are real, and they have their eyes set on Earth. With Nexus's power, Ayato becomes Earth's protector, fighting not only the supernatural forces of devils and angels but also extraterrestrial threats that he never even knew existed.

Ayato's once "normal" life has been shattered, and he must rise to the challenge of becoming the hero he never asked to be, fighting in battles that determine the fate of not only Earth but the entire universe.