Greetings, Heavenly Parents. I, Kotori Hirose, have turned 16, so I'm getting married. She is neither a lover nor a family member. She is not related by blood. However, the person I love living with me is Jun Takatsuji. When I was 6 years old, I was alone in the world, and he told me, "I want you to be my family." Those words made me so happy... 10 years later, I filled out my marriage registration and showed it to him! But the answer that came back was unexpected...!? I (16 years old) will do it!!”
The dull office worker Mirai suddenly finds herself reincarnated into the world of her favorite web novel, When the Golden Mirror Shines! Now living as the heroine, Luna, she rejoices at the chance to achieve a happy ending with her beloved hero, Valei. Since she knows the entire storyline, everything should be smooth sailing... or so she thought—until the novel’s author, whom Mirai practically worshipped as a god in the real world, starts rewriting the plot?! With one unexpected crisis after another caused by the author’s whims, can Mirai—now Luna—still reach her happily-ever-after with Vallei?!
https://www.cmoa.jp/title/281075/
Rei Arimura was a reclusive gaming addict, living a shut-in lifestyle. "There's no point in living like this anymore," he thought—until a sudden accident claimed his life! When he awoke, he found himself face-to-face with an unfamiliar old lady. She explained that Rei had been reincarnated into the world of the game he had played during his lifetime. He could return to his previous life and start anew if he successfully cleared the game. As a former world-ranking #1 player, Rei was confident and resolved to make the most of his second chance. However, upon reincarnating into the game, he found himself as the weakest mob character, with the lowest stats imaginable?! "—Fine by me! Mob or not, I'll clear this game no matter what!" Thus begins the comeback story of the strongest mob character, wielding the skills of a world-ranking champion, as he embarks on his revenge and aims for victory!