"Are you tired?" Luna asked, resting her chin on Lucas's shoulder. She saw Lucas's face up close now; sweat was trickling down from his temples to his cheek, and Luna gently wiped it away.

"We can stop if you're tired," Luna repeated. They had been walking for more than two hours along the road, surrounded by vast grasslands on both sides. Luna remained on Lucas's back, hugging his neck, while Lucas had his arms around Luna's bent knees.

Luna lifted her head, looking at the now darkening sky.

"Babe," Luna spoke again, concerned by Lucas's prolonged silence. She tilted her head slightly to see Lucas's face, which was focused straight...