Was writing doujin novels considered copyright violation?

(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*

An ordinary young adult of the age 20, Ryan was reborn in the modern family universe. His cheat allowed him access to ready-made scripts for movies and tv shows as long as he participated in the modern family plot. He could get system points through which he could buy scripts. Not to mention that although he was born into a relatively wealthy family, the system will also provided him with a minimum wage, which would automatically improves as his net worth increases. With so many ways of making money, Ryan decided he didn't want to be ordinary in this life and walked down the path of a legendary scriptwriter.

Just because you can’t explain it, doesn’t make it a miracle. Something like that happened to Aaron, an introverted youth, who expected to live a normal, boring life. But it took a little for the expectation to go wrong. Who knew he would transmigrate into his favourite Web novel, Forbidden Realms?

Su Yan always wanted to be an author. Being moved by his determination (Well, in fact, she was just an avid reader of his fan-fictions and wanted him to write full time …) official Shen Lu grants the aspiring author a system: The Lovely Writing System! Finding a strange app on his beloved notebook, Su Yan is sure he has fallen prey to a hacker. But why is this strange app issuing tasks related to his favorite hobby? Wait … What? He is supposed to write BL?! And what is this shitty task about experiencing story immersion?! No! He’d rather not become an author if that means he also has to become a shou! Follow Su Yan on his path to becoming the world’s greatest BL author … and to reluctantly becoming a beloved shou thanks to a shitty Lovely Writing System! Release schedule: The story is finished.

A happy and fulfilled life, everyone wanted that. Rio was no exception, he too wanted to feel joy and fulfillment. But how many actually achieved that? He didn't know, but he knew that he was not part of those. Rio, a part time editor of a webnovel called, The Last Stand, transmigrated inside the world of the novel. Not as a main character, nor as a villain, not even a student. But as a professor. A simple extra, professor that was never even mentioned in the story. Through some circumstances, he was the mentor of the main cast of characters. Armed with knowledge of the future, treasures of the world, and skills of different origins. He would raise these students to their utmost as early as possible. He felt that there would be no problem. However, as time marches forward he realizes everything was not as simple as he thought. The plot, or the future, as he knew it was going further down the rails. The body he occupied had a mysterious identity. A higher existence watches over him. Realizing the implications, he gave up on staying low key and unknown. He will strive, live, and survive admist this world of cruelty. A world set in a modern futuristic setting where cults roam free, capitalism corruption rises, demons and other races exist. However, even if he survived and lived, will he even feel happinness and fulfillment? He didn't know, but he will live still. — The MC in this story might feel light hearted at first, but as the story progresses he will become more darker. The characters might seem like gary stuish, but don't worry there are plenty of reasons for that. The story does not just focus on demons, but more so on other humans. I have no plans to make this a harem story, and usual super MC. Romance is bleak, I, so far, have no intention on making a lovey dovey scene. Expect daily updates, as I upload a chapter per day. — The cover art is not mine, if the artist has any intent or wishes to take it down please inform me immediately and proper action will take effect. (Undergoing EXTENSIVE EDITING rn)

Jackson Pryde was an ordinary ten-year old boy from an extraordinary world (MCU/Marvel), but during an alien invasion in New York City, he fell into a void and was sent to another world by the One-Above-All, with three of his classmates getting dragged along for the ride. With his system that the One-Above-All gave to him, Jackson retains himself while transforming into Death, while his classmates become War, Fury, and Strife, and are all sent to a world called Remnant. The first step of Death's epic adventure begins. Volume 1 : Death in Remnant Volume 2 : Darksider in Star Wars Volume 3 : Nephilim in the Pokémon World (Kanto)