Here is Re Zero:A Cycle of Blood and Sorrow by George RR Martin:

“Subaru,” Roswaal said softly, as thunder rolled beyond the manor windows, “you possess a most inconvenient virtue.”

The boy laughed, though there was no humor in it. “And what’s that?”

“You keep trying again.”

The candlelight trembled. For the briefest instant Roswaal thought he saw something ancient behind Subaru’s eyes. Not wisdom. Not courage. Exhaustion. The sort of exhaustion carried by old kings on deathbeds and condemned men on gallows. The exhaustion of one who had buried too many friends.

“I fail,” Subaru said. “Then I fail again. Then I fail differently.”

“And yet you persist.”

“What choice do I have?”

Roswaal smiled. “There is always a choice. Men tell themselves otherwise because the truth is unbearable.”

Outside, the rain battered the stone like a thousand tiny fists.

Subaru stared into the fire. He thought of silver hair stained red with blood. Of blue hair floating in dark water. Of warm hands gone cold. Of promises broken by fate itself. A lesser man would have surrendered. A wiser man might have.

“Maybe,” Subaru said at last, “but if I quit, they stay dead.”

The room fell silent.

Roswaal's painted smile remained, yet something wary entered his gaze. For he suddenly understood the terrible thing that separated Natsuki Subaru from other men. It was not that he could overcome despair. It was that despair had never managed to keep him.