C321 Some Truths Are Cruel

Gu Zhangning saw the bruises on Bai Yin's legs later on. At that time, Bai Yin was in her pajamas after she had taken a bath. Gu Zhangning was carrying milk into the room when he saw the bruises on the outside of Bai Yin's thighs.

Perhaps because Bai Yin saw him come in, she lifted up her pants quickly