GA: Geijutsuka Art Design Class OVA. "I Want to Draw the Blue Sky"

A Romance of the Three Kingdoms retelling using SD Gundams.

Legends speak of a Dark Tower with a race of dragons that awaits the command to arise and wreak havoc. At least Kyle used to believe they were only legends until his lady, Alita, is stolen by the Black Dragon! Now Kyle must form an alliance with Blau, a blue dragon, in order to rescue her before she becomes the catalyst for the Dark Tower's final program: the complete destruction of the world!

One hundred thousand years ago, he was the founding disciple of the Tianlan Sect, his master ascended to the top, and he was refining Qi. Ninety thousand years ago, his martial nephew ascended, and he was refining Qi. Fifty thousand years ago, the old dog who was the gatekeeper of Tianlanzong also ascended, and he was still refining Qi. Thirty thousand years ago, the old tree at the foot of the mountain also became a demon, and he was still refining Qi before he could pass the catastrophe. Ten thousand years ago, Zhang Wuji, the 9872nd generation disciple of Tianlanzong, also ascended, and Xu Yang silently refined Qi. He retreated for 10,000 years, and finally, he broke through the 9999th floor of the Qi refining period! Ten thousand years later, he broke through and came out!