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Firework Caught in A Moment
The reflection of a weak, dying firework. He sees it as an attempt to celebrate his birthday, though.
A Glimpse of the Universe
Door reflected a small and insignificant area in the boundless, long-standing universe, and disappeared. No one knows if he had made himself a part of the universe through reflecting the universe's image.
An Unknown Flower
Door has displayed the bloom of hundreds of plants patiently, among which only this one made him pause and watch for a long time.