Shen Zhi has been in love with Cheng Yue for seven years. In the past seven years, he put a glass of hot milk for her, stopped downstairs of her house for two hours, and waited outside the operating room for eight hours - but he still refused to say "I love you." He was trapped in the shadow of his family's hereditary disease, trapped in the shackles of "the Cheng family cannot be weak", and built a wall with silence and retreat. She waited on this side of the wall for seven years, waiting for the day she was diagnosed with lung adenocarcinoma, waiting for his engagement party, and waiting for him to finally write "I love you" - it was already too late. It's not that I don't love it, it's that I don't dare. It's not that I don't want to get close, it's that fear is more powerful than love. This is a story about "we obviously love each other but can't be together", there is no bloodshed, no tearing, only those silent details, missed looks, and the last late confession.