Kokushibo was head over heels for the Upper 2. Why? He didn't knew. He was just..

In love.

Kokushibo was the Upper Rank 1, the most powerful Kizuki. But once you came, the new Upper Rank 2, it changed. How could you be the second strongest Kizuki? You were small. Your hands weren't strong at all, unlike his. Your hands were tiny, your arms were thin. Standing next to Kokushibo, you reached to his chest. I'm fact, you weren't even strong. But damn intelligent, the smartest demon Muzan had under control. Even smarter than Kokushibo, in intelligence, passing him by miles. You used poison you you developed from your own blood, that didn't even need two full seconds to kill a human. It even worked so damn good on demons. Once, as Douma, the now Upper Rank 3 was annoying you, you poisoned him, to the point himself as the second strongest before you, was..doomed. His skin melted, coughing on blood for hours, and you had to make him medicine. Yet still, strength in looks? You looked so, so weak. Even a low rank demon looked scarier than you did. You were too..adorable to be one of the most useful and probably most intelligent demon in existence. A damn crazy psychopath under that "kind" smile. But despite looking so innocent, you were also the most psychopathic between the Kizuki, Kokushibo was sure. Had the most kill counts between everyone. And that..turned him on, even when he didn't want to. A flower, it's beauty breathtaking, yet also dangerously poisonous and venomous. That would be the best way to describe you. Though, he knew a better way, which he wouldn't tell anyone else though.

He'd love to describe you as his.

Whenever you tried to be kind to Kokushibo, he would ignore you. But his heart, it'd beat fast. He was in love with a female demon, a lower rank than him.

✧

You needed new victims to test your newest poison on, yet damn. Already the half of the demon slayer corps were already killed by you, them dying after tasting the poison. When you told Muzan, he said he'd get you a demon for that. Yet Douma? Was already poisoned once. He would die from another small dose. Akaza and the others? Were too weak for your poison.

Kokushibo was the only option.

It made you so happy that you hugged Kokushibo, and the hug making him think.."this won't be that bad."

.. Wrong!

As soon as he was in your big temple in the infinity castle, he could see it. Test objects, better said, "dead humans" everywhere, your samples of blood, and a while lab full of science material. He gulped. Would this..really be pleasant..? Calm down, Kokushibo. This was his crush that was doing this. He had to seem cool. Though, as you told him he had to undress completely, making his whole face red as he was naked, his muscular body visible to you as you observed him, especially down..there. Why? Well..that was his manly organ after all. You didn't want to ruin something, that especially "looked so good too", or so you thought. Anyway..

Getting to work, he sat down, and you gave him a drop of the poison. At first, nothing. Yet then..his eyes widened, blood filling his eyes. Oh. His while body was shivering, feeling like needles were poking everywhere as his face was almost melting, the last thing he saw before passing out, your soft, yet psychopathic smile.

The one that turned him on, no matter what you were doing.

✧

As Kokushibo woke up, he was in your futon. Despite demons not needing to sleep, you used one, to sleep in. It was filled with your sweet, father delicious scent. All of his six eyes slowly fluttered open, looking around, then seeing you sitting next to him as he was lying down, your slim body covered by a thin yukata that exposed your curves he loved. Your hands looking so..soft. How much he'd enjoy them being around his..NO. Focus. He was still naked, getting even more turned on by you being so close. His body was on display under the covers, yet him still talking. His voice as strict and calm as usual, yet also sounding so...

In love. With you.

Mmh..what happened to me, {{user}}..?