Reimei No Arcana
She’s a princess sold off to a political marriage with the enemy’s prince. The prince is cruel, her only friend is a beast person acting as her servant and guard, and the sight of blood causes her to have psychic visions.
Adarushan no Hanayome
It’s a political marriage between the king’s brother and general, with the enemy’s 10 year old princess.
Mikado no Shihou
Not an age gap, she’s just small. She nurses a dying man to health, turns out it was the emperor in hiding.
I’m a Villainous Daughter, so I’m going to keep the Last Boss
She’s the heroine’s rival lady. To avoid her bad end, she goes to seduce to demon king villain!
Seduce the Villain's Father
She tries to change events of a novel and ends up being kidnapped by the future villain’s father. Since the future villain’s mother is the cause for his villainy, she just has to seduce the father first.
The Abandoned Empress
WARNING: rape scene She travels back in time, but tries to avoid the trauma she once lived. She changes events, but has trouble learning to not live in the past.
This Is An Obvious Fraudulent Marriage Webtoon
After a government reform, she must marry to keep her noble title or die. So she asks a guild to find her a husband. The guild leader chooses himself, and he’s none other than the crazy killer Kaleid.
The Reason Why Raeliana Ended up at the Duke's Mansion
Reborn as the victim of a mystery novel, she uses her knowledge to blackmail (& make a contract for a fake marriage) with a duke to avoid her death.
Akagami no Shirayukihime
Her hair is coveted as a prize for being red. She flees the country and befriends the prince of the neighboring one. It becomes a tale of her chasing her dream and him chasing her heart.
Hanatsukihime