Liu Jisen stood in front of the tram track. At the intersection, amid the ding-dong bells, he watched a dark green tram passing in front of the shimmering sea. After the tram passed, a blue sea and blue sky appeared in front of him. He saw Xiandao Akira standing at the other end of the track, with his hands in the pockets of his school uniform, smiling lazily but warmly at Liu Jisen - why is it always you, a summer encounter.