They will hold an intimate wedding with just a few people important to them.

And Heiner loved the house by the sea and doesn't want to go back to the estate unless necessary hahahaha

He will be hearing her hear it again. But before that, he was jealous because the man from camp was visiting Annette because FL is teaching his little sister to play some piano and Heiner thought that she was with someone else. 

He was actually holding the violet flowers he first gave Annette.

This is the start of his redemption arc. So excited!

They will deffo get married after the war. But it's still a couple of years..
The house that Annette will be staying was given to him by Heiner and that was included in their divorce settlement... It was on the south, just in front of the beach that Heiner is planning to visit again with Annette after her suicide attempt and before their divorce.
It was Heiner's redemption arc, he really made it up with Annette, it's sooooo good to see both of them healing each other and healing from all the trauma the world has thrown to them.