Kaeya was happy there so why would he continue to bring Kaeya to dangerous places to escape their past?

Crepus can protect them and if he wont agree, he'll force them to stay.

// i love dark Crepus AUs

to get closer to Kya's dad (dont worry, Kaeya is safe in his house but he isn't allowed outside. Atleast he had Diluc for company.)

However, Kya's dad finds a basement in Crepus' home and sees Kaeya.

Crepus catches him and threatens to hurt Kaeya if he won't stay.

Kaeya cried in Diluc's arms and sobbed 'yes yes yes!'.

Then they had another round of sex to celebrate their engagement.

Best Birthday Ever!

He'd been staring at it for a near 30 minutes when Diluc shifted and hugged him from behind.

"Happy Birthday, Starlight. I hope you liked your present." Diluc muttered against his ear and kissed his cheek.

"I...I don't know what to say.."

"How 'bout a yes?"

// Happy Birthday, Kaeya! Congratulations on your engagement 💍