fandom little space oneshots

new dawn - kny

i cant fint the artist for the fanart

requested by: 

In the dimly lit laboratory, the faint glow of the rising sun filtered through the curtains. Muzan Kibutsuji, the most feared demon of all, stood hunched over his workbench, vials and papers scattered around him. The serum to allow demons to walk in the sunlight was nearing completion, and he was eager to test it.

Muzan's focus was interrupted by a soft knock on the door. He straightened up, brushing a stray lock of hair from his face, and called, "Enter."

The door opened to reveal Kokushibo, Muzan's most trusted upper-rank demon. With his six eyes and imposing presence, he commanded respect and fear. But Muzan saw him differently. Over time, Muzan had grown to appreciate Kokushibo's calm demeanor and insightful conversations.

"Good morning, Muzan-sama," Kokushibo greeted, stepping into the room. "How goes the work on the serum?"

"It's almost done," Muzan replied, his voice laced with excitement. "I've made significant progress, but I need more time to perfect it."

Kokushibo nodded, taking a seat near Muzan's workbench. As the hours passed, they delved into a deep conversation about the intricacies of the serum and their plans for the future. Muzan found solace in Kokushibo's company, feeling a rare sense of ease.

However, as their discussion continued, Kokushibo noticed Muzan beginning to squirm and fidget. He seemed distracted, his usually sharp focus wavering.

"Muzan-sama, is everything alright?" Kokushibo asked, concern evident in his voice.

Muzan forced a smile. "I'm fine, Kokushibo. Just a bit tired."

In reality, Muzan was struggling. He had discovered age regression a few months ago, using it as a means to give himself the happy childhood he never had. Today, he found himself caught between headspaces, teetering on the edge of regression. To make matters worse, he desperately needed to pee. Normally, he wore an emergency diaper for situations like this, but today, he had stubbornly decided against it, confident he could manage.

As time went on, Kokushibo's worry grew. Muzan's discomfort was becoming more apparent, and Kokushibo didn't want to push the subject too much. He respected Muzan's privacy, but he couldn't ignore the signs.

Finally, the serum was finished. Muzan held up the vial, his hands shaking slightly. "It's done," he announced, but his voice lacked the usual triumph.

They tested the serum, but it was a failure. The liquid bubbled and hissed, disintegrating in the sunlight. Muzan's shoulders slumped, his frustration evident. He fought to keep his emotions in check, but the stress was overwhelming.

And then, the unthinkable happened. Muzan lost control of his bladder, feeling warmth spreading through his clothes. Thoroughly embarrassed and upset, he couldn't hold back the tears any longer. He broke down, sobbing uncontrollably.

Kokushibo was by his side in an instant, his arms gently wrapping around Muzan. "It's alright, Muzan-sama," he whispered, his voice soothing. "Everything will be okay."

Muzan's cries softened, but he couldn't stop the regression. He slipped further into his little space, his mind reverting to that of a six-month-old baby. His sobs turned into soft whimpers, and he clung to Kokushibo, seeking comfort and security as he began chewing on the soft fabric of kokushibo's clothing.

Kokushibo held him close, understanding dawning on him. He had suspected something was different about Muzan for a while now, and it all made sense. He gently rocked Muzan, murmuring comforting words.

"You're safe, little one," Kokushibo said softly. "I'll take care of you."

Over the next few hours, Kokushibo learned to care for baby Muzan. He changed him into clean clothes, made sure he was comfortable, and provided the care and attention Muzan so desperately needed. Muzan, now fully regressed, responded with innocent giggles and contented coos.

As the sun rose higher in the sky, Kokushibo looked down at the sleeping form of baby Muzan in his arms. A new sense of purpose filled him. He would do everything in his power to protect and care for this side of Muzan, ensuring he had the happy moments he had been deprived of in his human life.

For the first time in centuries, Muzan felt truly safe and loved. And Kokushibo, despite the unexpected turn of events, found a new, deeper bond with his master.

Together, they faced the new dawn, ready to navigate this uncharted territory of their relationship.