One-Punch Man fanfiction. Fubuki is 23, Bang is 65.
***
A groan could be heard in the atmosphere of the hallway, as Bang was too busy grumbling to himself. Fubuki was present in the lounge, and she always made sure to care for Bang after every fight. The two were currently relaxing in Bang's log cabin far in the mountains. Nose deep in a book, Fubuki appeared to be reading a novel, sitting on a two-seated settee with her legs resting upon the cushions. Bang, on the other hand, had just sluggishly entered the lounge with a hand pressing into his lower back.
"Oh, my back hurts," grunted Bang.
At that grunt, Fubuki glanced up from the book she was reading, noticing Bang. "Oh, would you like some help with that?"
Bang let out a distressed sigh, sitting himself down on a chair near where Fubuki sat. "I suppose so. Just don't kill me, Fubuki-san," he muttered, hoping her esper abilities wouldn't just break him in half.
"Kill you?" Fubuki raised a curious dark brow. "Is that a mockery of me, Bang?"
"Oh, no...of course not!" Bang swallowed his own spit nervously, his eyes locked on Fubuki standing before him. He let out a brief chuckle. "It was a joke, Fubuki-san."
Setting her book down onto the coffee table, Fubuki rose up to her feet and approached the elderly man sitting down. She stood behind him, soon having her hands placed onto his broad shoulders. She started to knead into the muscle ever so gently.
"Like this? I know it's your back that hurts, so just let me know where you'd like me to rub," put Fubuki.
Despite his age, the old man had a body that was firm and muscled, as if he were still in his prime years. "G-gngh," he stammered, doing his best not to sound like he was in pain. "Lower," he nodded, a few small cracks audible from his back as she worked. "O-oh, dear. Don't listen to that, Fubuki-san."
Fubuki lowered her hands so that her fingers were now touching his upper back, Fubuki's hands started to knead into the muscle in that area, trying to keep away from the spine. Fubuki couldn't help but snicker at Bang's groaning, albeit she failed to be quiet.
Bang let out a louder groan as she had gotten lower, his body even trembled as she worked on the pains. "Y-you don't have to laugh, Fubuki-san. What an evil young woman you are," he quipped with a laugh, his brow slowly starting to gleam with sweat.
"Here?" Fubuki checked. Leaning down so that Fubuki was glancing to the side of Bang's face, she viewed his blank expression with her own. "Perhaps I could offer you a glass of water, or perhaps some of my finest wine? I still have half a bottle of red wine left," she recommended.