Margaret's life is cut short when she gets into a fatal accident at her workplace, except instead of the afterlife, she finds herself in another world! She's rescued from the brink of death by an elderly retired noblewoman who lets Margaret live at her mansion. What awaits her there is a stark contrast to her previous life: relaxed and laid-back countryside living! Sure, there's the whole fact that she was summoned to this world as a special being known as a Spirit Caller, but she couldn't care less as long as she gets to eat delicious food! She's going to get a fresh start taking life slow in this new world filled with magic and spirits! (Source: Cross Infinite World)

When Floortje is reincarnated into the world of an otome game, things immediately go wrong. Her fiancé, Prince Jonas, breaks off their engagement, and the supposed protagonist, the Saint of Light Jaromíra, makes Floortje out to be the villainess. Little do they know, however, that Floortje was a sumo wrestler in her past life—and she won’t let these weaklings stand in her way! After rescuing the cat-eared Prince Richie from the castle’s dungeon, Floortje embarks on a journey with an ever-growing sumo stable to save the kingdom from the grips of the real villains, Prince Jonas and Saint Jaromíra. With the spirit of sumo—her most trustworthy ally—to guide her, she’s ready for a smackdown! But why was she reincarnated into an otome game, and how did its protagonist turn evil in the first place? (Source: J-Novel Club)

Twenty-two-year-old Misuzu Kanzaki is suddenly transported to another world one day. She can see a game stats screen. She can use magic. It's as if she's in an RPG game world! As an otaku in her previous life, she has extensive knowledge about games. Using this knowledge, she's able to quickly adapt to her new magical world. She becomes known as the "Black Healer." A fantasy about a girl who survives a world of magic using her gameplaying expertise! (Source: Alpha Manga)

An anthology by various mangaka of smartphone RPG Fate/Grand Order.

When she wandered the border of life and death at the age of three, Cordelia realized that she had been reincarnated into a game she had used to play as a high handed noble girl. A dark future would await her if she fell in love with the Prince. Therefore, for the sake of a normal life, there was no road but to avoid the powerful prince and the heroine…… But just doing that would be boring. She finally was blessed with a beautiful appearance so she resolved to polish herself, firstly by beginning to study herbology…… This is that kind of story.

"Rejoice! I, the Emperor, shall make you my bride!" Orphaned and mistreated by her relatives, Sumire Inazuma never expected her life to change—until she and her cruel cousin Botan are suddenly summoned to another world as "Saints of Salvation." But when the Emperor Carlyle appears, it's not the lovely, manipulative Botan he proposes to—it's Sumire. Why her? And what is this mysterious, powerful bond that seems to link them across lifetimes? (Source: Kadokawa, translated)

The more you sleep the more you get stronger~~ My grimoire gives me new skills and magic as I wake up every day! Everyone else tries hard to memorise and understand their grimoire and gain new Magic or skill, But for me, I get them automatically. What I get all depends on my luck, but I can easily acquire Highest tier magic sometimes. While holding onto the grimoire like this, I enjoy my time in another world with my wife and friends that I made here.

Regaining the memories of his previous life, Cyril realised that he was an otome game’s character, the villainous daughter– Sophia’s valet. At the rate things were going, Sophia would eventually have the prince stolen away from her by the heroine, fall into darkness, and be executed. Wanting to save the villainous daughter he was so fond of, Cyril moved to eliminate all the factors that would cause her to fall into darkness, raising her up to be a talented and beautiful girl who could win the prince’s love, however…