Because of Feng Yuanyu's sad past, he has no confidence in himself and does not open his heart to others.However, one day when he returned to his hometown of Nagasaki, he reunited with Asano Taiyo, the only man with whom he had a connection that he could never forget.However, the joy of reunion only lasted for a while, and he encountered an accident.

In front of the grief-stricken Yu, a man who claimed to be a guide from another world said: “If you are willing to 'hand over your heart', then from now on, I will create miracles for you.” But the guide's condition of “ handing over his heart” was too cruel to Yu.What does it mean to exchange a heart for a miracle of rain?Then, according to the guide's “miracle”, what will happen to the two of them?Rain and Sun, who miss each other wholeheartedly, are intertwined with two people with completely opposite names. The purest love story this winter is about to begin.

Aihara Yu stood on the streets of Nagasaki, the raindrops gently patted her cheeks, bringing with it a hint of coolness.She looked at the familiar scenery with mixed feelings in her heart.Once upon a time, this place held her beautiful memories with Asano Taiyang, but now, those sweet memories seem to have become a source of pain.

Yu knows that the pain of the past is like a deep scar, engraved in her heart forever.She tried to forget, but those memories always followed her, reminding her of the pain she had suffered.Therefore, she chose to close herself off and not let people enter her inner world easily.

However, fate didn't seem to want to let her go.On this rainy day, she unexpectedly ran into Asano Taiyang on the street.The man who had connected with her and could see through her heart.They were best friends, sharing each other's joys and sorrows.But now, everything has changed.

The rain and the sun embraced each other excitedly, as if they wanted to get the past time back.However, at this moment, a sudden car accident broke this beauty.Yu witnessed the moment when Taiyang was injured, and the grief in her heart surged like a tide.

Just when Yu fell into despair, a mysterious man appeared in front of her.He claimed to be a guide from another world and told Yu:“ If you are willing to hand over your heart, I will create a miracle for you.”This proposal shocked Yu, but it also gave her a glimmer of hope.

Under the guidance of the guide, Yu began to try to release the pain in her heart.She bravely faces the shadows of the past and cleanses the wounds of her soul with tears.Gradually, she felt herself becoming relaxed, as if a ray of sunshine illuminated her heart.

Finally, with Yu's efforts, the miracle really happened.After a long recovery period, Asano Taiyang returned to Rain.Their meeting is no longer an accident, but an arrangement of fate.They rekindled their love for each other and wrote a bright future together.