Omae wo Onii-chan ni Shite Yarouka!? - Volume 3, 9th of May, Thursday.

As childhood sweethearts, they were made to engage under the manipulations of their families. It involved having to to live in the same room and sleep together.

One night, she is accidentally made drunk, and in his delirium, he kisses her only to realize he enjoys it. From time to time, he would sneak a kiss on her, but his “crime” is eventually discovered in an accident. After being accused by her, he says with a smile, “You are my wife, why can’t I kiss you?”

The two people’s daily routine is full of bickering and mutual discrediting of each other.

Although he claims to disparage, he actually cares intensely about her. He feels crazily jealous when she is close to other men, to the point of tying her to his side, so that she becomes exclusively his.

- Description from web

Before going to college, an ordinary high school student went to celebrate and got drunk. When he woke up, he found himself in a completely different world. There was a big sect, the approaching sect entrance examination, a slum where his body’s previous owner lived, and a shared memory about a missing young girl.

When he got tangled in a fight with a few punks in this different world, he fell off a cliff and miraculously found himself still alive, with two more voices ringing inside his head. They were Sword Master and Saber Master. In the company of them, he continued to find out more about this whole new world. He took the sect entrance examination, entered the sect, met a strange man in black, and even participated in a major competition of the sect to have a chance to win over his peers!
In this whole new world, he was born again and got to explore the fantastic martial world!

- Description from Novelupdates

Lady Dawn expected to die.After casting her soul to the wind, taking a one-in-a-million chance to escape the wretched dungeons of Taegrin Caelum, the once-caged songbird of the Asclepius wishes nothing more than to find her Hearth and warn them of the coming danger. Instead, she’s found herself a shade, anchored to a young man who knows far too much—and with far less hope than she’d started with.Toren Daen, for his part, only wanted to make it home safely. Now he’s in a world taken straight from the page, questioning what is real and what is fiction, and scrambling to make something worthwhile. And with his foresight, there’s only one way that Toren can see to keep this new world safe: prevent the descent of the Legacy. But those in power will not make it easy: Nico Sever is in a league of power all on his own, and Arthur Leywin bears the burden of Fate a continent away. In this familiar-yet-not world of mana, monsters, and looming deities, any misstep along the roads of Alacrya and the High Sovereign’s Dominion could lead to a Fate worse than death.But what is death to a phoenix? With a burning secret in his mana core, knowledge of the future, and a maelstrom of fears and questions, Toren might just survive to be more than what Lady Dawn expected him to be. He might just survive to waylay the encroaching tide of death in the proxy war between raging asura clans.More than all of that, he might just live.

She went out of the way to help him build a business empire and get his inheritance. When she thought they would live happily ever after, she and her entire family were quietly gotten rid of and burned to ashes. As the blaze seared her skin, she was overcome by deep hatred and bitter regret, and wished she had another chance…

Dizziness jolted her out of unconsciousness.

She is now known as Miss Su. She tried to run from her wedding, but slipped and fell in the river, which incidentally, brought great shame upon both her and her fiance’s family. The word on the street is that her fiance is a playboy, a make-out king, and a bit of a lady’s man. But she has to salvage this marriage to carry out her revenge plan.

And… the more she gets to know her future husband, the more she needs to find out. He turns out to be much deeper and more sophisticated than he cares to show to the outside world.

- Description from Novelupdates