Rengoku x fem!reader (fluff)
5-day Christmas fluff prompts 
Snow dusted the rooftops in soft white as lantern light glowed warmly through the windows of the estate.
You sat near the low table, wrapped in a thick blanket, carefully stirring a mug of hot cocoa. Steam curled into the air, rich with the scent of chocolate. Across from you, Rengoku sat far too tall for the space, knees folded awkwardly beneath him, watching you with unmistakable interest.
“THAT SMELLS WONDERFUL!” he declared cheerfully.
You laughed. “You don’t have to shout, Kyojuro.”
“AH—SORRY!” He grinned unabashedly, flame-like hair flickering in the firelight. “I simply find myself very excited.”
You handed him a mug, and he accepted it like it was something sacred.
“Hot cocoa,” you explained. “It’s a Christmas thing.”
“UMAI!!” he exclaimed immediately. “So warm! So sweet! It fills my chest with joy!”
Your heart nearly burst at the sight of him—snow outside, fire crackling, and Rengoku smiling like he’d just discovered happiness for the first time.
“You really like it, huh?”
“VERY MUCH!” he nodded enthusiastically. “Drinking this with you on such a peaceful night makes it even better!”
He scooted closer, entirely unprompted, his shoulder brushing yours. The heat from his presence chased away the cold far more effectively than the fire.
Outside, snow fell quietly.
Inside, everything felt golden.
You pulled the blanket higher, and without hesitation, Rengoku lifted an arm and draped it around you, bold yet impossibly gentle.
“Are you warm enough?” he asked, voice softer now.
“Yeah,” you said quietly. “Thanks.”
He smiled down at you—bright, reassuring, and full of warmth.
“I am glad,” he said. “Protecting warmth—whether from the cold or from loneliness—is very important.”
You laughed softly and rested your head against his chest. His heartbeat was steady and strong beneath your ear.
“I could get used to this,” you murmured.
“EXCELLENT!” he replied immediately. “Then let us do this every winter!”
He held his mug carefully so he wouldn’t spill a drop, sipping slowly now, clearly savoring the moment.
Snow continued to fall. The fire crackled. Cocoa steamed between your hands.
Rengoku glanced down at you again.
“Merry Christmas,” he said, eyes glowing like embers.
You smiled, warmth blooming in your chest.
“Merry Christmas, Kyojuro.”
And wrapped in firelight, cocoa, and the safest arms you knew—you realized this was your favorite Christmas yet.