The Moon and the Sunflower [Sanshan]

"A human child." The boy sat on a tree branch in tall wooden clogs, swinging his legs. "Are you really going to adopt him?" When he received an affirmative answer, a crimson glint flashed in the boy's eyes. A pair of black wings unfurled behind him. "I hope you won't regret this decision." Before the words had even left his mouth, the boy was gone from the branch, leaving only two black feathers drifting slowly down. Premise: