A time-travel scene, with a girl and a boy sitting on the rooftop on the lower left, looking up at the sky, and a boy in high school student clothes looking down on the upper right. It feels like traveling through time and space. A grainy oil painting, with a close-up of a boy in the crystal dial, a campus background, blue sky, green leaves, yellow flowers falling, white clouds floating, Makoto Shinkai style, soft colors, simple details, this is a movie poster, high resolution, high quality, high details, best quality