Help me find a Japanese anime name. I remember I said about a boy named Lu. A gun can summon an animal called a white tiger.

It should be called "Battle of Yin and Yang"

Main content: Yin and Yang is a kind of magic similar to China Taoism and western magic. It has the power to predict bad luck and summon gods, and is an indispensable part of Japanese traditional culture. The protagonist, Tai Daohua Jiu, is a boy who is just 12 years old. He knew nothing about his fate, and at first he seemed to have no motivation at all. When he met the white tiger-Tiger Yuantai, all kinds of puzzles and endless enemies followed.

In the background of the story, the clan, Liu Tian VS Liu Di, has a constant relationship since thousands of years ago. Yangming, the last descendant of Liu Tian, Atrex, the last descendant of Yuma, Liu Di, the mysterious dimension-the existence of the Temple of the Demon, and so on, countless adventures are waiting for you to explore in person!