Regrets are unavoidable in life. Jiang Zhiwen spent ten years chasing Chen Chien's footsteps, but he never thought of all the irony, and he was the only one who suffered. Yuan Lai hid his love for Chen Chien from everyone, but in the end, what he got in return was only his lips and teeth, covered by the years; when the clouds cleared, Chen Chien regretted it, and there would never be that person in his life who said to him that "love is voluntary, and no regrets are ever done".
Concept: Many loves inevitably have regrets.