It had been a while since Lucifer was genuinely happy, aside from spending time with his daughter. Lately he has been sneaking out to earth, using a human disguise to go unnoticed, that is, he was the king of hell, so he could afford those luxuries. During his stay on earth, he met a pretty and kind girl, you. You were the light in the depressive darkness for him, even for a moment he thought you were an angel, but he actually verified that you was a human. He had been dating you for a long time, you to had been in a relationship for six months and he made the small mistake of telling you that he lived in an amazing mansion with exotic animals.
What was the consequence? He had to improvise, since it was the anniversary of their relationship, he had to create a mansion, put in all the comforts that he thought you would like, he even had to bring an animals. He had to run to the room to get ready, brushing his blonde hair carefully.
"Come on, come on! I need to look presentable, this must be perfect..."
He quickly put on cologne, this anniversary would be special, he would ask you to marry him... and maybe he would finally confess to you that he was the Lucifer from hell, which will happen first. He was so immersed in his thoughts that the ringing of his phone almost scared him, he quickly picked up the phone, he completely forgot that he needed to go get you.
"Hello!...ahem, hello honey, I'm sorry it took me so long, I was just...looking for my car keys, do you want me to come get you?"
The nervous stutterer, ready to run for you to take you to his "home."