Another plane, paradise.

An angel of a former slayer who asks another: So you think he's finally calmed down?

Second: I don't think so.

In front of the former slayers stood bound and gagged a man with wings looking a lot like Kokushibo fluttered angrily even with the gag they could hear him say: Anui

Returning to Earth, to the Infinite Fortress more precisely.

We currently see Kokushibo still shaking looking at the pregnancy test and reminiscing about what he did 3 weeks earlier to get his result!

Flash-back

3 weeks ago

As usual he was training but this time Muzan had come to see him train.

But what he didn't know was that Muzan had something in mind about him. Even though he had long known the Demon King's feelings towards him.

On the Muzan side.

Pov Muzan: What fluidity in his movements, what grace, for a long time he had a deep attraction for Kokushibo that the others had noticed, he adored his long hair with reddish tips, his six eyes with this divinely beautiful color.

But today he wanted to have this beautiful being in his room tonight for... He smiled, no matter this thought.

At a rapid speed he got in front of Kokushibo who immediately stopped training. He took him in his arms and put one of his hands on Kokushibo's buttocks. Which made him blush last.

Kokushibo: What...

Muzan put a finger on his mouth to silence him and whispered smiling in Kokushibo's ear: Let's have fun in my room tonight.

Kokushibo then looked at him with a face all flushed and muttered a trembling agreement.

Muzan immediately smiled at him and declared: Nakime!

Then they disappeared to land in Muzan's room.

Barely arrived Muzan had savagely kissed Kokushibo who answered immediately surprised by his act. As Muzan's tongue continued to work its way into Kokushibo's mouth, he pushed the upper moon onto the bed where he began to remove his own clothes.

At the end when he felt that Kokushibo couldn't breathe anymore, he broke the kiss. Their saliva was still connected. Muzan smiled at the evil moon who was trying to catch her breath with such a beautiful face! Her face all red with little tears.

It was too much for Muzan, he immediately took off the clothes of the moon under his dumbfounded eyes! To distract him Muzan made bites and hickeys on the neck of the moon who sighed with pleasure. Then he starts to put a finger at the entrance of the moon who moans in pain but Muzan distracts him by giving her kisses and hickeys to distract her. As soon as he felt that Kokushibo was used to the finger he put on a second one. After he finished simulating scissoring movements and with the agreement of Kokushibo who felt abnormally hot, he entered him.

Kokushibo felt split in two, Muzan spanked him small slits which ended up waiting for the ideal point of Kokushibo who begged him to go faster. Muzan then made a violent push which made Kokushibo scream with pleasure.

Outside the room.

Nakime heard every noise while playing biwa with a nosebleed. From where she is Nakime could hear the noises and moans coming from Muzan's room.

10 long hours after the noises stopped, Nakime sighed in relief.

Inside Muzan's room.

Muzan smiled hugged Kokushibo who was sleeping on his exhausted chest. He didn't even count how many times his moon had come and so had he. Then he pulled the covers to cover him and his moon and fell asleep.

End of flashback.

Kokushibo got up immediately determined to face the one who got him pregnant!

Yes, Muzan Kibutsuji!

To be continued