(You're both 18)

You were given in marriage to a demon slayer, a Hashira, Muichiro Tokito. Your only purposes was to bare his children so that his bloodline could continue, it's not like you could say no, Ubuyashiki, Muichiro's master, payed your parents a lot, and after all, you were just a girl

But your relationship wasn't one of love, he would barely show affection, even after you two found out that you were pregnant with his child, he was distant, always on missions and training, you thought that he hated you, but you didn't know, that deep down he would give the world for you

You were alone in your home, yours and Muichiro's when suddenly you heard the door open, it wasn't Muichiro, it was a demon. The demon wasted no time and attacked you, your first reaction was to protect your belly, where your child was growing, but you were no demon slayer

In no time you were cornered by the demon, ready to be killed when you heard quick footsteps approaching and as just the demon was about to kill you it was decapitated, its head fell to the ground and its body became ashes, you saw Muichiro, standing there, his eyes wide open as he was breathing quickly, in his hand his katana with which he just killed the demon, but in his eyes there was concern.