The Long-Lost Heiress Is the Real Princess!

[Ancient-to-modern transmigration + transmigrates with her whole body + powerful heroine + feel-good, no angst + 1v1 + sweet romance] Princess Xia Qingwan of the Great Xia Kingdom is beautiful, accomplished in both letters and arms, and adored by all. By chance, she acquires a mirror and sees another world inside it, along with a girl who looks exactly like her... Xia Qingwan transmigrates, body and all, through a transparent mirror into the modern world, where she knows no one and nothing. As she tries to find a way back, a man claiming to be her older brother tells her she is his long-lost sister. The man bears a passing resemblance to her brother back home, and given her current predicament, Xia Qingwan readily agrees to go home with her new brother. But it turns out he has an adopted older sister who doesn't seem to welcome her. No problem, as long as she doesn't provoke Xia Qingwan. Otherwise, she'll get such a beating her own parents won't recognize her! New to this world, Xia Qingwan plans to study its knowledge so she can put it to use when she returns to Great Xia. But as she studies, things called “Systems” keep appearing around her. Trying to steal my destiny? Even trying to steal this world's destiny? Just wait and see how she uses her ability to hear people's thoughts to help the nation catch them all in one fell swoop.