Man.... so we got a crazy ass empress wanting to kill MC, there's the girl from the first city without the collar that has some really weird shit going on that can throw him into this world, then there is our real world girl here (who might not be her in spirit) who might just be the most powerful witch ever with great powers hidden and is kinda indiable cuz she just pops a new head out when needed, and then there is an evil witch that eats brains and they need her help....
And also, the curse is still on.
MC is still in coma.
And trying to get the "oh, let's forget the past and just make new memories" seems very much what a goddess with a hidden agenda would do. Even if her plan is just to stay with MC.