A 26-year-old salesman selling green juice. A 66-year-old veteran bluesman. Their lives have been swapped! (Source: Futabasha, translated)

https://www.cmoa.jp/title/316683/

Jeweler Alfonso's fourth wife, Mercedes, is a beautiful woman with the unusual background of being a former knight. However, having had an unfortunate upbringing and been divorced three times, he distrusts women and shows no signs of being a newlywed. Mercedes, on the other hand, diligently fulfills her role as mistress of the house, but is troubled by her husband's inscrutable emotional fluctuations and his reluctance to open up. "Every couple overcomes trials before they can become a family"—a revelation Mercedes receives, and begins her search for what it truly means to be a "real couple"… (Source: Futami Shobo, translated)

In a world where the war between humanity and the Demon King’s army never ends lies the Empire’s 11th Frontline Base. Karia Alexandra, a young woman who loves books above all else, is assigned there as a librarian. But behind her quiet dedication, she carries a secret mission—one that could change the course of the war. Thus begins a “battlefield bibliotheca fantasy,” where knowledge and magic meet on the frontlines. Now, the highly anticipated manga adaptation is here!

The marriage arrangement introduced to the duke’s daughter, Hermina, had been to the rumoured worst playboy in high society, the Earl’s son, Erich. Hermina, who accepted the offer, sends him a letter with conditions for their married life. The letter had nothing but unreasonable demands, but Erich says that he’s happy and that he’s looking forward to their married life…!? "I’ll become Hermina-sama’s dog or manservant for the rest of my life." - What is this guy saying!? Isn’t this just fluff between a beautiful intense wife and a con-man husband? A newly-wed love comedy.

Action-drama about two multimillionaire highschool girls who use their wit (& money) to sort out all the trouble they encounter.

Woo-Yeon, who is perfect in everyone's eyes, and Jae-Hee, who have been living their lives without any major ups and downs, loving each other. One day, as a bride-to-be preparing for her wedding with Woo-Yeon, Jae-Hee has a dream about the day she first met Woo-Yeon. Since then, Woo-Yeon seems different and memories she had forgotten start to pop up out of nowhere... (Source: Lezhin, translated) *Note: Part of Lezhin's Sunaemul Danpyeonseon (순애물 단편선) Collection.*

***Note:** This is part of [SSS Romance Collection](https://www.mangaupdates.com/series.html?id=51452525576), this being the fifth story.*

"There's no other woman I want to be with but you, Kanade." Kanade entered a contract marriage with Kazuomi, the cold and calculating CEO of a real estate development company. After a year of wasted efforts and endless disappointments, she decided to file for divorce and move out without a word. Determined to start her life anew, she soon finds herself drawn back to working for her ex-husband due to a string of unexpected events. Can she uncover what lies hidden deep within Kazuomi's heart of ice? (Source: MangaPlaza)

Lily's house has been sold by her stepmother and she has to move out right away. The buyer is a gorgeous man named Ciro. But she's certain his charming mask is hiding a coldhearted businessman. Unexpectedly, he visits her right before she must move out and invites her to dinner. Then he offers to pay her brother's college tuition and asks her to marry him! She's been shying away from men ever since she made love to and was promptly dumped by her ex-fiance, yet she begins to think that Ciro is a man she can trust...Until she learns after the wedding that what Ciro was dreaming about was a "pure" bride. (Source: Renta!)