Definitely Miu could be one. She's a strong and kind character in the series. Shigure is also a likely candidate as she has her own charm. Then there's Renka, who is feisty and could be attracted to an interesting OC. And perhaps some of the other female students at the dojo who see the unique qualities of the OC and become part of the harem.
Well, it could be about an original character (OC) who joins the world of 'Kenichi: The Mightiest Disciple'. The OC might be a new student at the dojo. As for the harem aspect, perhaps the OC has unique qualities that attract multiple characters from the series, like Miu or Shigure. They might start to develop feelings for the OC, leading to various comical and romantic situations as the OC tries to balance training and these new relationships.
One story could be that you plan a surprise picnic for your sister. You secretly prepare all her favorite foods, like sandwiches, fresh fruits and her beloved chocolate cake. Then you take her to a beautiful park, find a shady spot under a big tree and lay out the picnic blanket. As she sees all the delicious food, her face lights up with joy.
I bought her a bouquet of her favorite flowers for no reason at all. When she saw the flowers, she had a big smile on her face immediately. It was such a simple gesture but it made her really happy.
"I recommend" The ferocious Wolf King in the day actually cries in my arms at night "to you. The story is set in an orc world. The female protagonist, Ni Luoluo, transmigrated to this world due to a mission and discovered that not only did she have cute ears and a tail, but she was also chosen by the orcs to be the queen. The male lead was a handsome Beastman who had a wonderful relationship with Ni Luoluo. There were also some sweet elements in the story. I hope you like my recommendation. Muah ~
I made my little boy happy by baking his favorite cookies. I let him help me in the kitchen, measuring the ingredients. When the cookies were done and he took the first bite, his face lit up with pure delight.
Once, a son saved up his pocket money for months. He then bought his mom a beautiful scarf that she had been eyeing for a long time. When he presented it to her, she was delighted. It wasn't just about the scarf, but the thought and effort the son had put in to make her happy.
I'm not sure specifically as there could be many different stories about the mightiest king in the world. It could be about a king who had great military power and conquered many lands, like Alexander the Great. He spread Greek culture far and wide through his conquests.
One possible fanfic could be about a crossover where Naruto and Kenichi meet. Maybe Naruto visits the world of Kenichi and they end up training together. Naruto could teach Kenichi some of his ninja techniques, while Kenichi shows Naruto his martial arts skills.