How to make the story length longer?

A Professional Transmigrator meets a newbie Regressor. ❄️❄️❄️ He lived an average, fulfilling life and died of old age. The next moment, he opened his eyes as the Princess of Asmaria. While looking forward to his new life, he died again. And so began his 151,897,914th life as Samur Eckart. Samur is a Professional Transmigrator- or so he says, as he gets transmigrated into a new world every time he dies. However, each time, his memories return only moments before his death. If he successfully survives, he gets to live that life, if he dies, well, he just moves on to his next moment of death. Once again on the verge of death as Samur, he’s saved at the last moment by a young boy. Surprise, surprise, the young boy is a Regressor. As a man of honour, Samur intends to repay his debt then leave because the world is too inconvenient to live in. Well, that’s what he thought, at least, but the Regressor and his friends are kind of… weird, and he can’t seem to get away at all? However, not everything is as it seems. Samur’s whims have made him the part of an eternal lie. Shadows dance in glee as they concoct a requiem far grander than anyone can imagine, while the Lights tremble in delight as the apocalypse threatens the Universe. The dies have been cast, the play has been written, the characters are on the stage, and the sacrifices have been made. And so, it’s finally time to let this game begin. ~~~~~~~~ The cover photo obviously does not belong to me. Discord: https://discord.gg/qxmPDzXYTZ Instagram: @_anit666_

Summary: A Tarnished who has done this whole song and dance a million times before and has reached max level in every skill, starts up one last run. Why? To finally give every last one of his waifus the happy endings they deserve, of course. Told from the perspective of said waifus, as they all try to desperately get a handle on the Tarnished and his antics. Give it a try and let me know what you think! This story is already completed on all of my other websites. Posting it here, one update a day, to see how it does.

Synopsis.

This is the story of an Illegal Pharmaceutical Scientist Otaku who died, and was reincarnated into DXD as pure blood devil. "If people got themselves reincarnated into another world, usually they would try their best to fix the plot into better one right? Me? Sorry I think I'll just taint or rape all the beautiful women that are my type. (Not for Kids high amounts of rape :3!)

Past present future, this book comes from my wild era.

In her previous life, Su Anya was plagued with misfortunes, and the root of her misfortunes was herself. Her cowardness filled her path with pain and sufferings. Su Anya was kicked out of the school as she was framed for cheating in a competition, at that time she couldn't even fight for her own justice. When her most trustworthy best friend stole her designs, she didn't even have the courage to confront him. Her sister died as a result of her carelessness, making her despised by her own brother. "You are the most selfish person." These are the words that kept haunting her, and she wanted to run away from them. Finally, Su Anya found an escape route, i.e., death. After suffering, the heavens give her a second chance, and Su Anya is reborn ten years back. In this life, Su Anya had decided to make amends with her regrets. Su Anya's plan does not include revenge; instead, she intends to make peace with all of her regrets. Regret for not taking a stand for herself. Regret for distancing herself from her brother and sister. Regret for being a weakling and a coward... In this life, she will make peace with her regrets...