C1422 How Did You Know?

Hua Duanyue looked at Bai Sujin and chuckled, "I bet you still don't know how I figured it out, right? Well, let me tell you! You do have a bit of cleverness! You thought... I wouldn't realize you were an imposter, didn't you?

But you overlooked one thing: Sujin and I grew up together as sisters... and our relationship is more than just that. You probably don't know this