The first week on medication felt like walking on new ice every step tested, every heartbeat listened for.
Luffy woke up early that morning, not because of any habitual routine but because of the way his body moved. He felt the medication's effect on the ache, on the rhythm of his heart. He felt distant, as if his energy had been swathed in cotton wool. He hated it. He hated that he felt it. He hated most of all that Catherine felt it too.
She never said a word. She adjusted her routine without any fuss. She didn't switch on the espresso machine most mornings. She made herbal tea or decaf instead, with a splash of oat milk because he loved the way it frothed. She started walking him to the café every morning, even on days she didn't have any meetings scheduled. She said she wanted "fresh air and a proper goodbye kiss at the door." She wanted to ensure that he didn't overexert himself going down the stairs.
Luffy did.
Because fighting these small changes meant admitting how scared he was of these changes.
Their first official "decaf date" was on a Tuesday evening.
Catherine had closed her laptop at five sharp, gone to Brewed Promises, and waited at her usual window seat until the last customer had gone.
Luffy had flipped the sign, locked the door, dimmed the lights until fairy glow was all that was left. He had then prepared two decaf lattes, one of which was lavender for Catherine, and one of which was regular with cinnamon for him. He had then brought these over to their table.
This time, instead of sitting beside Catherine, Luffy had sat across from her. Catherine had raised an eyebrow.
"Formal tonight, Hubby?"
Luffy had given her a small, tired smile. "Wanted to look at you. Not just feel you next to me."
She had reached across the table and laced their fingers together over their warm coffee cups.
"How's the new normal feeling?"
"Like wearing shoes that don't quite fit yet," he admitted. "But better than before. The sharp pains are almost gone. Just this dull weight now. Like someone parked a small cat on my chest and told him to stay."
Catherine's thumb caressed over his knuckles. "Shadow's job is already taken. He's on permanent heart-guard duty at home."
Luffy smiled, a low chuckling sound. "He's good at it. Sat on my lap the whole time I napped yesterday. Didn't move once."
They sipped their coffee in comfortable silence for a while, listening to the low drone of the cooling espresso machine and the distant rumble of traffic outside.
Then Catherine spoke, her voice so quiet it was almost a whisper. "I looked up hypertrophic cardiomyopathy last night. After you fell asleep."
Luffy's muscles went rigid. "And?"
"And I cried for an hour in the bathroom so you wouldn't hear," Catherine said, her eyes locked on his. "Then I made a list. Diet changes. Stress relievers. Light exercises we can do together. Yoga videos. Breathing apps. Places with low altitude we could visit someday if the doctors say it's okay. I... I'm building a battle plan, Luffy. Because this isn't just your fight. It's ours."
He swallowed hard. The tears that pricked at the corners of his eyes were due to the steam rising from the latte.
"You're scary when you're determined, you know that?"
"Good." She squeezed his hand. "Because I'm determined to keep you here. Annoying me with bad puns and burning toast and stealing the blankets for at least another fifty years."
He brought her hand up, kissed the silver ring on her finger.
"Then let's make the plan together. Tonight. Right here. Over decaf and shortbread crumbs."
They stayed until almost midnight.
On napkins, on the back of old receipts, they wrote:
No more late-night baking marathons. Dough rises during daylight hours only.
Walks every evening slow walks, hand in hand, no rush.
Yoga twice a week in the living room (Catherine promised not to laugh when he inevitably fell out of downward dog).
More couch nights with cats and movies, no guilt about closing the café early sometimes.
One weekend a month: no plans. Just them, the yellow door locked, world on mute.
When the napkins were covered, the decaf coffee cold, Luffy leaned across the table, his lips slow, tasting of cinnamon, of quiet determination.
"Thank you for not letting me pretend I'm fine," he said.
"Thank you for letting me in," she said.
They walked home under streetlamps that turned the leftover patches of snow silver.
Shadow met them at the door, tail high, eyes shining as if he had been counting the minutes.
He rubbed against Luffy's legs, then Catherine's, then herded them toward the bedroom as if he were the usher.
They put on pajamas, brushed their teeth side by side, laughed when the toothpaste foam got on the end of the other's nose.
In bed, Catherine nestled into the left side of Luffy's ear, her cheek over his heart.
Luffy put his arms around her.
Shadow took his usual position between them, his paw exactly at the point where their hands touched, over Luffy's heart.
Catherine ran her fingers over the silver ring on his finger.
"Feel that?"
"'My heartbeat?'"
"No. The promise. It's still here. Stronger than the medicine. Stronger than the ache."
Luffy pressed his lips to her forehead.
"I feel it," he said. "Every time I look at you. Every time Shadow stares at me like he knows something I don't. Every time you hold my hand like it's the only thing keeping me on the ground."
She smiled against his skin.
"Then keep feeling it. Every day. Until it's the only thing left."
He pulled her closer.
"Deal."
They fell asleep like that, three cats, two rings, one shared heartbeat slowing down to the rhythm of careful, stubborn love.
Outside the yellow door, the world went on, cars, lights, people passing by, people asking quiet questions in empty cafes.
Inside, the battle plan was on the nightstand, next to the medicine bottle.
And on their fingers, silver sparkled with the faint light of the streetlamp small, steady, never fading.