Forbidden

~ Prologue ~

To start, something has to be clear.

Yoriichi Tsugikuni was the most powerful demon slayer in history. From him came all the breaths and he created the strongest breath, the Breath of the Sun.

Yoriichi Tsugikuni was not weak.

But he had a weakness.

He was an Omega.

And it's not that being an omega makes you weak. Oh no, that Yoriichi had demonstrated by kicking butts to anyone who got in his way, Muzan Kibutsuji included.

However, his heats due to being an omega were his weakness.

Yoriichi changed immediately when his heat was close.

Not even the most powerful slayer was spared from that.

Yoriichi quickly began to gasp and moan. Sweat trickled down his forehead and his hole began to get wet, ready to take an alpha. Yoriichi became a wishful omega who only wanted an alpha.

His five senses were silenced and the importance that if the alpha who took him was human or demon, cease to exist.

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For starters, something has to be clear about this.

Muzan Kibutsuji is a coward.

He runs away if he knows that he is in danger and would not mind leaving some demon behind, this is how he was able to escape from Yoriichi when they faced each other.

However, he did have an advantage.

He was an Alpha.

That meant that in the heats of the omegas, they had the advantage.

Muzan was sure that taking Yoriichi was going to be a perfect way to avoid being killed, because he knew that he was not going to be able to kill Yoriichi.

And when he smelled that exquisite scent in that little cabin in the woods, Muzan did not hesitate and entered.

To his surprise, he found a Yoriichi tearing and trembling, in the midst of his heat.

Perfect....

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Uta dropped her basket when she saw Yoriichi appear in that field and with a stomach of about 4 months.

"Yo-Yoriichi," She said in shock, looking at her best friend's stomach.

"Uta." He whispered softly.

"Come in." She quickly woke up from her shock and delicately, she took Yoriichi's right arm and carried him inside.

With a cup of tea, Yoriichi told what happened to Uta who was in shock and with tears in her eyes.

"Oh, I'm so sorry Yori." She said as she gave him a hug.

"Uta, I need your help." He said with some nervousness in his voice.

Uta quickly separated from him.

"Hm, you don't even have to say something. You will stay here from now on. I will take care of you with Haru. I care very little who the father of the child is, you are my best friend."

Yoriichi gave a small but bright smile. He knew that he could count on the only person who did not turn his back on him, except for his late mother.

"Thanks, Uta."

And as stated, Yoriichi moved in with Uta and her son, Haru. Uta pampered Yoriichi and when he went to give birth, she called a wet nurse and Yoriichi gave birth to a beautiful omega boy and called him Tanjiro.