Diluc and Kaeya are stepbrothers who grew up together. After the death of their father, they want to adopt a child to be even a little bit happy.

On the morning of the first day Diluc was in the kitchen preparing breakfast. Kaeya came up to Diluc and looked at him with an indifferent expression.

Diluc: "Is the child awake?"

Kaeya: "No."

(Diluc and Kaeya are not lovers, brothers.)