[Both leads are each other's only partners, 1v1, no rivalry between women, equally matched, marriage before love, subverting expectations]
Song Wanyin has just turned fifteen when an imperial decree arranges her marriage to the emperor's younger brother, Prince Jin Shangguan Yu, who has already come of age. After the wedding, Song Wanyin plays the part of Shangguan Yu's dignified princess consort. Then one day, Shangguan Yu discovers that Song Wanyin can dispatch a gang of kidnappers with swift, decisive strokes. Only then does he realize his princess consort is far more than she seems. But Shangguan Yu doesn't let the fact that Song Wanyin has kept secrets from him drive a wedge between them. He continues to treat her as sincerely as ever, and as they spend time together, Song Wanyin gradually falls for him, too.
Premise: Answer sincerity with sincerity
