Take all I say with a grain of salt because someone else read this all in a spoiler forum.
- So Sera and the mc are actually twins. So she's not actually in the world she's just dreamed about Sera's life.
-Sera and the Mc are actually not the chairman's children their mom cheated with his older brother (whose dead now) and he knows the truth. That's also why the chairman was away so much because he was trying to find the twin.
- Plot twist Sera was crazy because psycho purple bitch cursed her with hallucinations bad emotions. That's also why she and Erewhon (blue hair I have no idea how to spell his name) had no problems before she was cursed.
- The chairman was also apparently gay for Erewhon's dad
Credit to @Miguel'stiddies
Girly just wanted one person to stand by her side :(
I’m glad she isn’t dead