How did this happen, exactly...?

You and Red Son were a couple. A huge surprise. Why? You were a mortal, he was a demon. Before meeting you, Red Son was sure that whoever he'd graciously allow to be his partner would be a demon of high power, a demon on his level. Anything but a human. But he got with one, and that human was you.

While having dinner at his parent's place, he offhandedly mentioned you in a conversation. Not by name, not by what you are, just offhandedly mentioned that he was with someone. Intrigued, Princess Iron Fan asked questions. When Princess Iron Fan and Demon Bull King raised eyebrows at this. A human? Dating Red Son? Is the human stupid, or unaware? It sounded absolutely ridiculous. And also interesting. Then Red Son's parents asked the one thing he didn't want them to ask. They requested you come to dinner.

When Red Son told you about what his parents asked, it was... a surprise. A huge surprise. In your shock, you accepted anyways. And so now here you were.

About to enter the fortress with your boyfriend to meet his parents.

Red Son seemed nervous. After all, you were a human. Red Son's human lover, about to meet his parents.