"Found it!" Ayu came out with an old photo album. She sat down next to Zhong Hua, opened the album, pointed to a photo and said, "Look, this is a photo of me and my grandmother at the entrance of the alley when I was a child. The old house we lived in is in the background." The photo was a little faded, but the smiles on Ayu and her grandmother's faces were still clearly visible.

Zhong Hua looked at the photo, his heart filled with emotion. He thought of his father and the wonderful times they had spent together. He gently held A Yu's hand and said, "Perhaps all of this is a signal from our loved ones in another world. They have always been with us and have never left."

Ayu nodded slightly, tears glistening in her eyes. She rested her head on Zhonghua's shoulder, and the two sat quietly like that, listening to the rain outside the window, feeling each other's warmth and companionship.

As time passed, the rain gradually subsided. The sound of rain on the cassette tape also gradually stopped, leaving only a faint electrical hum. Ayu and Zhonghua seemed to have snapped out of their reverie about this conversation with time, and they decided to explore the cassette tape more deeply.

Zhong Hua carefully removed the cassette from the cassette player and examined it closely. He noticed some fine scratches on the cassette's casing, as if it had been scratched by something sharp. Ayu, meanwhile, was flipping through an old photo album, trying to find more clues related to the cassette from the pictures.

"How could this cassette tape be connected to our relatives at the same time?" Ayu asked in confusion.

Zhong Hua pondered for a moment and said, "Perhaps there are some stories behind this that we don't know yet. Maybe our relatives have crossed paths with us, but we just haven't known it."

In their search for answers, Ayu and Zhonghua decided to visit Ayu's mother, hoping to get some information about her grandmother and the cassette tape. Ayu's mother lived in a neighborhood not far from their home. The two packed their things, took the cassette tape and photo album, and hurried over.

When Ayu's mother saw the cassette tape of "Scenes in the Rain" and the photo album, her expression changed slightly, and a complex look flashed in her eyes. Ayu and Zhonghua told their mother about the strange phenomenon that occurred when the cassette tape was played, and their mother remained silent for a long time after listening.

“Actually, there are some things I’ve always wanted to tell you,” Ayu’s mother said slowly. “Your grandmother and Zhonghua’s grandfather were classmates. When they were young, they went through a lot together and had a deep friendship. Later, for some reasons, they separated and started their own families, but they have always kept in touch.”

Ayu and Zhonghua exchanged a surprised glance. They had never imagined that their family members had such a connection.

“This cassette tape was a gift from your grandmother to Zhonghua’s grandfather,” the mother continued. “Years ago, they saw this cassette tape together in a music store in Shanghai. Your grandmother thought the music on it was very nice, so she bought it and gave it to Zhonghua’s grandfather. Later, the cassette tape passed into your grandmother’s hands, and she has treasured it ever since.”

Ayu and Zhonghua finally understood the story behind the cassette tape, and were filled with emotion. They realized that this cassette tape was not just an old object, but also a bond of affection between relatives, carrying their memories and longings.

After returning from Ayu's mother's house, Ayu and Zhonghua carefully put the cassette tape back into its box and treasured it. They knew that this cassette tape would become one of the most precious treasures in their family.

Outside the window, a magnificent rainbow appeared in the sky after the rain. Ayu and Zhonghua stood by the window, gazing at the rainbow, their hearts filled with warmth and gratitude. They understood that although their loved ones had departed, their love and memories would forever accompany them, like this rainbow after the rain, beautiful and eternal.

In this old house steeped in history, Ayu and Zhonghua continue their lives. The cassette tape of "Scenes in the Rain" lies quietly in its case, like a guardian of time, protecting those beautiful memories and waiting to be awakened again, to tell stories of love and legacy once more. Ayu and Zhonghua, carrying the love and expectations of their loved ones, will bravely step into the future and write their own brilliant chapters.