Our story begins in the Sengoku era, where Mizu Tomioka was the first water breath user thanks to Yoriichi Tsugiruni who taught him how to use it.

But, he hid the fact that he was an omega because he considered himself weak to be a Demon Hunter.

They received encouragement from Yoriichi telling him to keep fighting and that he too was an omega.

Encouraged by his words he was more ashamed of his statue of a Demon Hunter and he was relieved that his peers did not consider him an omega but one of their own.

But unfortunately his heat came at the worst time and he had to interrupt his mission to take refuge in a cabin to get past it and not get caught by an alpha and that's when the door opened and a being in the eyes red and raven-haired came in and smiled at him.

Muzan is the kind of person who has no qualms about running away like a coward when he feels his life is in danger and manipulates people for his own pleasure.

He had one advantage, however.

He was an Alpha.

Its meant it was more powerful than Omegas

And when he smelled that exquisite perfume in that little cabin in the woods, he didn't hesitate and entered.

To his surprise he found a heartbreaking and shivering demon hunter in the midst of his heat, who had beautiful raven hair and especially his eyes that captivated him; they were a beautiful sky blue.

He is perfect and smiles at her while leaning.

Mizu arrived at the Kamados' house knowing that her friend Yoriichi would be there since her return from the Demon Hunters and that he could help her.

When Yoriichi saw him with his 4 month old belly, he immediately rushed towards him.

- Mizu… that's why you disappeared for 4 months, I was worried about you, he whispered in shock.

- Yoriichi said Mizu almost to tears, please help me.

- Come in for when talking over tea suggested Suyako kamado who had arrived noticing their visitor.

Mizu accepted the invitation after going inside and being served Mizu told what had happened to her.

- I'm deeply sorry, I should have been with you that day, he said hugging him.

- Yoriichi, I really need your help, Mizu said nervously.

Suyako smiled at him and said:

- Don't worry, we'll help you, my husband and I and Yoriichi and whoever the father of the child is and you're Yoriichi's best friend, so we are too.

Mizu started whispering a thank you and crying with relief.