Kotonoha

Countess Fiora has been trapped in the same fate for five consecutive lives, always reaching the same disastrous ending. Unable to endure it any longer, she throws herself from a terrace after exposing her fiancé's betrayal. But instead of returning to the past, she wakes up in an unfamiliar room. The person who saved her is Islan, the son of a marquis whom she met during her third life. Having somehow escaped the regression that should have followed, Fiora begins her fifth life. Determined to discover why she keeps returning to the same tragic fate, she uses the knowledge accumulated from her previous lives. Meanwhile, Islan—who also possesses memories from a previous life—joins her investigation. A fantasy romance about an exhausted “ice-cold genius” and a devoted, solitary nobleman, as they search for the one future in which they can stay together.

In her previous life, she was a kindhearted grandmother who enjoyed reading romance novels recommended to her by her granddaughter. After her death, she unexpectedly awakens inside one of those very novels as Sashuna, the story's villainous noblewoman. For most people, discovering they've reincarnated as a villainess destined for destruction would be terrifying. Sashuna is delighted. After all, she adores the novel's heroine. If playing the villainess and ultimately meeting her own ruin is what it takes to ensure her favorite character reaches her proper happy ending, Sashuna is more than willing to make the sacrifice. And so she resolves to become the perfect villainess. There's just one problem: Sashuna is terrible at being evil. She may look like an intimidating noblewoman, but underneath she's still the gentle grandmother from her previous life. Her attempts at villainous behavior repeatedly turn into acts of kindness, and instead of destroying her reputation, Sashuna somehow becomes increasingly popular with everyone around her. Then there's Josner, the perpetually expressionless knight assigned to guard Sashuna's fiancé. He keeps interfering with her plans, watching her suspiciously and appearing whenever she's trying to perform her villainous role. Eventually, Josner discovers Sashuna's secret, throwing her carefully planned destruction route even further off course. Sashuna only wants to play her part, become the perfect villainess and gracefully ruin herself for the sake of her beloved heroine. Unfortunately, her grandmotherly personality keeps making everyone like her, and one particularly persistent knight seems determined to make sure she never reaches the ending she's aiming for. A villainess reincarnation romantic comedy about a former grandmother desperately trying to become the story's hated antagonist, only to discover that being genuinely awful is much harder than it looks.

"Nadia, you must marry into the royal family in place of Priscilla." Nadia, a daughter of a margrave who has dedicated herself to the knight order as a knight, is to marry Ethan, the third prince known as the "devil," in place of her stepsister Priscilla. However, the rumored crown prince turns out to be a young man with a kind and delicate heart...!? The two had only intended to stick to a pure marriage that was limited to three years, but gradually they begin to connect with each other. A love story of misunderstandings, a heart-fluttering love story between a former knight and a margrave's daughter, and the crown prince, who is often mistaken for someone with a tough face! https://www.cmoa.jp/title/337096/

Laila, a herbalist researcher, travels to the country of Kanista and becomes Ashlen's fiancée.One day, while living a smooth and happy life, Laila decides to go on a field research trip far away with Ashlen.Laila is excited about the overnight research trip, but a prince from a neighboring country named Elliot appears before her.The group is annoyed by the prince, who, despite being a classmate, views Ashlen with hostility and is overly close to Laila. ...At the same time, the gears of a "poison"-related incident begin to turn.Love is put to the test by these two people who rely on each other, in this agonizingly painful second volume of a research romance!Original Web Novel

A young girl who loves books more than anything else, decides to join the imperial palace because the palace is full of rare books. However, she does not spend the night with the emperor, and instead, she is constantly involved in mysterious incidents...