She got married to the emperor as a scapegoat because her clan doesn’t like the emperor. They faked everything abt how shes the precious daughter but in reality she’s neglected. Each clan has to send one of their children to the emperor as a consort, so the emperor could use their powers for the empire’s benefit. The reason why it’s straight bc mc is 8 yrs old and its pretty weird if you’re expecting to hav romance from the emperor also spoiler;:……..
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Mc becomes the crown princesz
You also have to remember that for a large part of history, marriage has been a way of uniting families, not just as a pact of love between two people. Our current concept of marriage is relatively new. This is especially true for a lot of asian cultures, where the cultural mindset is more communal/based on community (I forget the exact word) compared to the individualistic mindset/values seen in many western cultures. (This also hasn't always been the case, but yeah, it's how it be now).
So she got married to the empress but this isn’t GL but instead straight? How is that possible