The land is curved/I can't see you/I can only see from a distance/the blue sky in your heart
The two people were connected in spirit, but she lost the courage to pursue her in front of him, and their relationship was still shallow. He chose the latter between love and family affection, and left with loneliness and loneliness.
Time is as light as thin sand. When he comes back, there is already someone beside her who has been guarding her for 5 years. Moreover, he unintentionally brought them together, so should he pursue or stop? And when she keeps discovering his shadow at work, will she become more clear about her feelings? Also, will he notice the changes in her after guarding her for 5 years, and will he succeed in retaining her in the end?