Anthology of pairings involving Russia. Russia x Japan (pg 3-9) by Ryou Takagi, Russia x China (pg 10-16) by Chidori Sakuraba, Russia x Prussia (17-23) by Sonami Fujitani.

https://www.cmoa.jp/title/304065/ A straight-laced young lady who doesn’t know how to depend on others × a devoted crown prince from a neighboring kingdom… A contract marriage that sparks a heart-squeezing, romantic love! Iris, a noble’s daughter, is blindsided when her fiancé, Prince Lloyd, declares: “You’re a 24-point woman!”—giving her a failing grade and breaking off their engagement. Shaken and unable to hide her shock, Iris suddenly finds herself approached by none other than Reno, the first prince of a neighboring kingdom, known as the “Prince of Solitude.” To her astonishment, he proposes marriage on the spot…!?

1) Sekai o Ageyou 2) Under the Heaven 3) Aka no Matsuei 4) Mirai Douwa

“I object to this marriage!” Erin shivered as the sound of that voice echoed through the wedding chapel. Dimitri Makarov! There are two reasons this handsome Russian businessman is so well-known. The first is his unparalleled business acumen, and the second is his scandalous behavior. Beautiful women, gambling, rebellious behavior—he has a taste for danger and has spent his life gravitating toward it. Erin used to work as his secretary and ultimately ended up spending a night with him. He said it was a horrible mistake, so when she discovered she was pregnant with his child, she disappeared without telling him. Now, seven years later, he’s appeared again, this time at her wedding ceremony!

The second installment of Dokushin Fugou Club series.

The third installment of Dokushin Fugou Club series.

Princess Lunaphilia, who has been treated poorly since childhood due to a leg problem, is forced to marry the tyrant of an enemy country. Though she feels reluctant, Lunaphilia tells herself that it is selfish for someone like her to want to freely choose her own path, and the day of her departure arrives. However, before she can reach the enemy country, she is kidnapped by Cain, a monster feared by the people as the "King of the Night." This is a fantasy story about the love between a demon king whose love is too intense and a lonely princess. https://www.cmoa.jp/title/342524/