Ming had witnessed it all.
From when Gray confessed to Sato's turn and all the way up till they kissed, Ming was there.
To the boy that saw Sato as his bright light in his dark never-ending tunnel, it was as good as extinguishing the light source completely. He was now trapped, lost, paralysed by the darkness. What was in front of him, Ming did not know. When can he see again, Ming did not know. He was clueless.
Yet, Ming knew this day would eventually come. He had predicted this outcome back when he had made Sato his beacon of hope. Ming had always known Sato saw him as his own brother, his best friend. And that, would never change. Everyday felt like there was a ticking time bomb on Ming's chest. A tight sinking feeling of doom, emanated from the depths of his heart.
Today, the bomb finally gave way. It ended Ming's suspense and yet, killed everything within him again. He was back to square one. The boy lost in the dark dark tunnel.