What are some things to consider when writing a futa x older brother fanfic in a non - inappropriate way?

Kubei was just an ordinary pencil and button pusher working a day job, hating his boss and making horrible speeches when one day he fell asleep after pushing an all-nighter. When he woke up, he was bound to a chair, facing three creepy robed women and in a body way too young and way too weak to be his own. As he slowly came to, he realized that he was no longer in the same universe as he was before. He had teleported to the Kingdom of Helius, where an all-powerful church rules its lands and wages war against the elusive group known only as Mages. Armed with an incredibly cocky neural interface that just won’t shut up and his own sheer wit, our MC will find himself not just fighting to survive, but maybe even something bigger than himself.

The betrothal gift is two million bucks, not a single cent less. Jiang Yu is already eighteen years old and can get married now. Send the money to my card, and this matter is settled!" Jiang Yu looked at her mother, who was talking non-stop on the negotiation table. She watched as her mother named her price as she sold Jiang Yu. Jiang Yu could not believe it. Eighteen years ago, they brought the wrong baby home from the hospital, and Jiang Yu, the real daughter of a wealthy family, ended up in an orphanage until a year ago. Jiang Ran, the fake daughter of the Jiang family, grew up with a silver spoon in her mouth. With superior resources since she was young, she was more outstanding than Jiang Yu in every aspect and became the pride of the Jiang family. Jiang Yu, who wandered most of her time in the outside world, was nothing but a country bumpkin who made her mother a laughing stock in the socialite circle. However, Jiang Yu had no idea how great her mother's hatred for her was. On the day she turned eighteen, her mother 'sold' her with a named price. Jiang Yu said, "If you want to marry your daughter to someone else, it should be Jiang Ran. I'm your real daughter. You're the one who mistakenly brought Jiang Ran home!" Her mother replied, "Shut up. I wish I hadn't given birth to you. You've brought nothing but shame to me!" Jiang Ran said, "Big Sis, everything Mom does is for your own good. Don't blame Mom." Her mother said, "I'm convinced she's nothing but a debt collector who's come to me to collect her debts! Either you give me two million bucks, or you get married obediently!" Jiang Yu left home in despair. By a freak combination of factors, she found herself accidentally marrying a Mr. CEO. From then on, the thirty-year-old man pampered his eighteen-year-old wife to the heavens. The little girl said, "Mister, someone bullied your wife!" The man, "Which incompetent fool is so blind that he dares to bully you?"

Xu Xu thought she knew it all. As a no-nonsense top-of-class police academy graduate, she was certain that she was ready for whatever the world threw at her. However, when she was paired with the world-famous detective, Ji Bai, she quickly learned that theory and reality were not always the same. Together they would catch murderers, crack decade old cases, take down international human trafficking rings and even stop a maniacal warlord - all while simultaneously dealing with their budding romance. It was a battle of attrition as their relationship was forced to go to hell and back, but would it prove too much, or would love ultimately prevail?

(Chapters re-written: 7,8) (Chapters to re-write:from 1 to 6, 9 to 61) Born in a rather particular family situation, Ethan finds himself having to face life with the desire of making his parents proud of him, from heaven. But, he didn't manage to do so because of an unfortunate accident, which caused his death. Now outside his own body, Ethan was afraid of having to meet his parents again, without having been able to fulfil his desire, but it is precisely at this moment that a voice speaks to him. [Would you like to be reincarnated?] Hearing these words, Ethan had various thoughts in mind, but, he understood that, with this, he could have another chance to satisfy his desires, and this, brought him to instantly say yes... [Your wish to be reincarnated into the world 1042, titled {Danmachi} has been authorized and granted by God] --- My own discord ID: watashiwavdesu#2029 (Author Notes: I will post one chapter a day) You should enter my server discord. https://discord.gg/cpVr5X8 *I do not own Danmachi and the cover*

***Note: Cover photo doesn't belong to me. Credit to the real owner. It all started in one night. It all started with this.... "I heard you had money to spend and I'm just in need of that cash. I'll pay with my virginity. If you're not pleased by me, I'd let you go... I'll consider it my bad day. Here's a medical report I'm disease free. What do you say?" That's the night Jade wish to forever forget... but can never forget. A night she had lost her innocence because of her love and was sorely betrayed. A night Jake wished he should have treated differently...But he didn't. What happens when Jade spends a night with a man she wishes to never meet but she's obligated by her company to sign a contract with him?...Let's go find out how he tries to win this woman who he couldn't get out of his mind. Will Jade fall for all his antics to win her heart? Let's go find out. ***Note: Cover photo doesn't belong to me. Credit to the real owner.

Servus 132-X is not new to the reincarnation cycle, in fact this is his 365th incarnation! In the past, he has been a subject of songs and legends, being incarnated as a king, a knight or a mage that sire the birth of many nations and civilizations. In this timeline, he, unfortunately, lost all of his innate abilities and skills. Now born as a slave, he must work his way to get his freedom and rise, to create a nation on the new world he's been born in. Prepare yourself for an action-packed, world-building experience filled with mystery, intrigue, betrayal and most importantly magic! Be ready for a ground-breaking World Building experience!