The love between Gu Zhenran and Cen Yu is very beautiful, it is not love at first sight, let alone earth-shattering. All they have is staying together.
It's the two words "I".
However, in this story, the first person to be guarded is not the little girl Gu Zhenran, but the proud man Cen Yu.
When he set foot on a familiar land, he found that things and people had changed, and the love that once belonged to him disappeared. She stood beside him, accompanied him, and warmed him, but she did not exchange the words "I love you."
However, during the time when her voice was at its darkest, he held her in his arms and fell in love with her.
"Gu Zhenran, I will guard you."