Tsubasa Reservoir Chronicle -

He looked at his right arm. Whole. The clone had given him that, too.

Syaoran stared at the sleeping form of Sakura, which floated nearby, still incomplete, still waiting. If he refused, the real Syaoran would remain trapped forever, and the timeline would collapse. If he agreed, he would vanish. Sakura would wake to a stranger wearing his face. Fai and Kurogane would forget him. Mokona would chirp for a master who never was. Tsubasa Reservoir Chronicle

“You wish to exist,” Yuuko had said to the real boy. “Not as a copy, not as a tool. But as a true person, with a past, a present, and a future. To do that, the clone who lives your life must first become real himself. And for that… he must lose everything.” He looked at his right arm

He looked directly at the magician. His left eye, the one that held the curse, blazed silver. Syaoran stared at the sleeping form of Sakura,

He thought, I am not real. But my love is.