In the Ultraman Universe: Call Me the Devilish Trainer

Ever since Lu Yu inexplicably beat up Da Gu's version of Ultraman Tiga in the Tiga universe, it seems he has... opened the door to a whole new world.

Lu Yu: “Da Gu! Don't be scared! Sure, I like beating you up, but that's just training! How can you mistake me for a world-ending villain?!”

Da Gu: “S-Senior! Please be the bigger person and stop sending so many... kind and adorable... monsters... to train me!”

Lu Yu: “Hey! I didn't send them! Some naughty little rascal who wouldn't listen must have decided to come out and play!”

Da Gu: “...”

Lu Yu: “Wo Meng! Why are you standing so far away from me?! That show-off Agul is the one who needs fixing. You're my dearest friend, my brother in arms. How could I possibly bring myself to hurt you!”

Wo Meng: “...Senior, are you seriously saying you have no idea about the three or four monster attacks every day?!”

Lu Yu: “Uh... How could I know?! Maybe the monsters just woke up and wanted to get some fresh air. I stay home all day, so how could I know when they'll show up... right?”

Wo Meng: “Senior... do you really think... I believe you?!”

Lu Yu: “Believe it or not, I believe it!”

And so, a bizarre legend gradually spread throughout the Ultraman universe: a strange man who liked beating up Ultraman. The protagonist has never thought of himself as a good person, nor has he ever thought of himself as a bad one.

Laughing and raging, he roams the world; through love and hate, he remains attached to the mortal realm.