Dragons: Fate of Black and White

In the summer of seventeen years old, a black helicopter flew across the sky, and the door to a strange country opened to Qian Yue and Lu Mingfei at the same time. The two best friends embarked on an extraordinary road to slay the dragon, and also opened up a fate that they were unwilling to accept but had no choice but to escape... Notes while sitting: Dual protagonists: Su Mu (original) and Lu Mingfei, focusing on the growth of the two teenagers. The plot will not be the same as the original work, it will not reduce the status of any original character, and it will not belittle anyone. Neither Natsuya nor Eriri will die. There is an outline and there are no plot points, so don't worry. The protagonist is semi-invincible, unable to lose or suffer.