The Cost of Pride~ Kokushibo x F! Reader (Completed)

Betrayal

A/N: Here we go, my lovelies. Buckle up because the storm has arrived. I'm going to make this chapter and the next one as long as I can so I hope you can enjoy it. I tried my best with the angst so if I don't make you cry, that's okay- I'll do a better job to make some heartbreaking angst. 

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"Do you want to become a demon?" 

The man asked, tilting his head to the side as he sat comfortably on the rooftop, smiling at Michikatsu, a shiver running down his spine the longer he stared at him. "A demon? Why do I need to become a demon?" He asked, narrowing his eyes at Muzan, who was trying to persuade him to become the very monster that he hunted down.

"The demon slayer mark you have will kill you when you reach the age of twenty-five, correct? If you become a demon, then you will have power and the ability to live forever. I know you have someone to protect like your lover, for example?" While listening to Muzan, he did have a point, after all. Putting his sword back into its case, Michikatsu narrowed his eyes again suspiciously at the demon that showed no intention of attacking or harming him.

"I'm listening..."

There had to be a reason why Muzan wanted to speak to him and try to persuade him to become a demon. "I know you are afraid of death, and you haven't surpassed your brother power-wise. You could be the most powerful demon, and you will be able to protect your loved one as well."

Muzan grinned when he saw that Michikatsu was considering his proposal to become a demon, and that was what he wanted, "If you become a demon, no harm will come to your lover. You will have enough strength to protect her. That is what you wanted, right?" Muzan was a cruel man who was able to manipulate others into getting what he wanted.

If he can pinpoint a weak point, he would be able to deceive his target, turning them into a demon with a snap of his fingers if they survived the process. After a moment of silence, Michikatsu got on his knee and bowed his head to Muzan in response. He accepted his proposal to turn into a monster that you despised with every fiber of your being. 

"I accept your offer. I have one requirement, however. No harm is to come to my lover. That is all I ask... Muzan-sama."

"Of course. No harm will come to her." 

~•~

After three days had passed, Michikatsu had not come home as he promised. No matter how much time you went looking for him passed, you were worried that he did not come home. There wasn't any news of his death, nor was his sword delivered to you personally if he died. Yoriichi had left as well to look for Michikatsu to see what happened, so you and Yoriichi parted ways to look for him.

Within days, you were not successful in your search, so you walked back to the Demon Slayer Corps without any luck of seeing your lover again. Once you were getting near the entrance, you heard yelling as well as the other demon slayers cursing Yoriichi's existence and his brother.

"Moriko-sama. I don't think this is a good idea-"

Aika advised, but you ignored her before entering the Demon Slayer Corps, only to have many eyes glaring at you with such bitterness and treachery. "Yoriichi? What's going on?" As you walked near the Sun Breather, you were not given a response from your childhood friend.