the concubine (blonde guy) uses black magic to make people love him, that's why the king loves him (and others).
The previous queens maid (that died) knew this, that's why she was killed.
The king forces the queen to sleep with the concubine (rape) because he wants a baby that looks like the concubine.
The queen’s has a bad and sad end (she dies)
MC has a reverse harem but ends up choosing the red haired duke.
But at the end the MC chooses to go back to her own world and not stay in the fanatasy world cause she think it's super shitty. Especially after the queen died.
basically a lot of story building with no retribution, no happy ending for anyone and just a shit story overall (to me personally)