One great story could be where the reader is a new vampire and Mikaela helps them adjust to their new life. It often has a lot of emotional moments as they both struggle with their vampiric natures.
You can try websites like Archive of Our Own (AO3). It has a large collection of fanfictions, and you can easily search for Mikaela Hyakuya x Reader ones using the search bar.
It might not be exactly what you need, but I'll try my best to recommend a novel that is most relevant to your description of your needs: "The Unique Tenderness of a Dragging Girl: Guardian Angel" is a romantic youth-youth campus novel written by the author, Hua Lingyue. The general plot of this novel is:
She was a thoroughly bad student. In the entire school, no one dared to say no to her! However, that was before she met him! He was the dream lover of all the aunties and girls in the school. He had a handsome appearance, an enviable family background, and a large group of crazy men and women following behind him!
When the arrogant and barbaric girl met the gentle and handsome prince, the two of them accidentally became deskmates. A pure love in school began to sprout! Because of him, she slowly transformed from a demon, and he became her personal guardian angel! Welcome to the crowd!
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"Dark Prince Charming's Favorite" was a romantic youth-youth campus novel written by the author, Moe God Qianqian. The general plot of this novel was:
[Sweet Pet, Sweet Pet, Sweet Pet]
It was rumored that Sheng Wanwan was unruly, eccentric, and ugly.
He relied on his good family background to bully women and men all day long.
It was said that Sheng Wanwan was about to transfer to Sakura High School. That day, she was so scared that the most handsome students in the school took sick leave and did not dare to go to school. However, the rumored ugly Sheng Wanwan was nowhere to be found. The new girl was clearly prettier than the school belle, had a sweet personality, and had a pleasant voice.
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"Daily Story of Youth" was a light novel written by the author, Milky Way Starlight. It was an original fantasy novel. The general plot of this novel was:
Kazuya Minami wanted to earn money to show filial piety to his parents so that his sister would not have to save up her pocket money and secretly give it to him. However, after a long time, he realized that his sister was always staring at him with the eyes of an orthopedic surgeon! Minamikazu was also panicking. He wanted to ask his good friend and best friend, Junichi Fukuda, for help, but he was tricked into going to the back of the teaching building and doing a kabedon.。
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"Go to the anime world to get a handsome man" was a sci-fi space-time travel novel written by the author, Bu Qing. The general plot of this novel was:
After seeing the female protagonist travel through the anime world to find so many beautiful men, the male protagonist held his forehead helplessly and thought to himself, When will this little fool come to find him? He had waited for this person for a thousand years. He did not expect her to still be so stupid after a thousand years. The female protagonist finally came to the male protagonist's world during her last time traveling. The male protagonist saw the female protagonist and immediately went forward to French kiss her. [My inner OS: Why are you only here now? Do you know how long I've been waiting for you?] If I don't punish you properly, how can I face myself? The female protagonist thought to herself, What's going on? Now, this is…I've been forcefully kissed? PS: 1v1 He super invincible wife-protecting demon Little Black Fox x sworn to be a righteous girl with a sense of justice.
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"Saving the Dark Naruto World" was a light novel written by the author, Duke One or Two. It was a doujinshi derivative novel. The general plot of the novel was as follows:
In the war-torn Naruto World, it was a collapsing world. Hatred filled the ninjas, and children who had been hurt in their hearts would choose to turn dark.
As the Chosen One, Yuan Yi's mission in entering Naruto's world was to use a loving heart to influence them…
Yuan One wandered around the villages, helping the children who were homeless in the chaos of war. With the three "bugs" in the system, she became the new generation of "Orochimaru who kidnapped children." Yuan One was helpless. She didn't want to become a strange auntie.
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"My animation made millions of viewers cry" was a novel about urban life written by the author, Yi Huo. The general plot of the novel was:
He had transmigrated to Japan in a parallel world and became the president of an animation company. However, the most memorable things he had were basically tear-jerking animations. Makoto Takagi said,"Don't blame Brother Cheng for being inhumane. I was forced to do so." From then on, Japan in the parallel world had an additional "Tear-jerking Demon King,""Warrior of Love," and "Blade Rich Man." The audience: "Rubbish Makoto Takagi. I'll never watch any animation he participated in the future!" When the new animation was broadcast…it smelled so good!
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"The Cute Love Project: The Chief Young Master's Pet Hunting Rules" was a romantic youth-youth campus novel written by the author, Dingxiang Liuli Yue. The general plot of this novel was:
Ever since she accidentally bumped into him on the first day of school, her life had changed drastically!
All kinds of fouls were committed in front of the entire school!
Thus, overnight, she became the public enemy of all the girls in the school…
Behind him, she grabbed his collar angrily."It's all your fault! Now I get into trouble everywhere I go!"
However, his smile was devilishly handsome."Since that's the case, you can just come to me directly!" "Get lost!"
This young man has doted on her from the very beginning, doting on her even more. Since that's the case, then this lady will reluctantly accept it!
[Daily update tick][Sweet pet tick][1v1] Scamming goods are guaranteed, please enter the pit ~!
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"Comic and Animation Battle" was a light novel written by the author, Gentle Rainy Season. The general plot of this novel was:
In the school's Apocalypse, he took away Sako from Poison Island, a woman who had been in his heart since the first time he saw this anime.
In the Little Fox Matchmaker, he had changed the fate of Mud Mountain Red, the woman he loved but had a tragic life.
One world after another. When he arrived at his destination, what would be waiting for him? Living with the person you love, or…
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"Hand in Hand, Let Go and Embrace" was a modern romance novel written by the author, Mu Xiu Yu Bin. The general plot of this novel was:
When did she fall in love with him? Don't ask, if you ask, you'll fall in love...
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"From One Punch to 50/50" was a light novel by the author, Kitty. The general plot of the novel was:
White Jade was bound to the Long-Wishing System. From then on, she would accept commissions in every anime world and fulfill the wishes of the people she entrusted. Saitama,[If there is anyone in this world who can compete with me, it must be Bai Yu.] "White jade?" Hehehe, what a filial child." "Huh?" White Jade! I haven't settled the score with that guy for peeping at me while I was bathing!"
In a Naruto and Sekirei crossover fanfiction, one key element could be the power systems. Naruto has its chakra - based ninjutsu, while Sekirei has the unique Sekirei powers. Combining these would be really interesting. For example, a Sekirei character might learn to use chakra to enhance their existing powers or a Naruto character could gain some Sekirei - like abilities. Another element is the characters' personalities. The determined and often brash Naruto characters mixing with the more diverse and complex Sekirei personalities can lead to great character interactions and storylines. There could also be a new world - building aspect, like how the two very different worlds of Naruto and Sekirei merge or co - exist.
Superman from the DC universe. Superman stands for truth, justice, and the American way, but his methods are often more lenient compared to Akainu. The two could have a philosophical debate about justice while also having to fight a common enemy.
One idea could be a crossover with the X - Men. Spider - Man could team up with Wolverine. Their different fighting styles would make for some amazing action scenes. Wolverine's brute strength and healing factor combined with Spider - Man's agility and web - slinging abilities would be a great combination.
A crossover with Captain America could be great too. Spider - Man, with his youth and modern - day sensibilities, could learn a lot from Cap's old - fashioned values. They could fight side by side against Hydra agents or other villains, and Spider - Man could show Cap some new tricks when it comes to acrobatics in combat.