A Company President diagnosed with cancer accidentally transmigrated into a novel, and became the villainous emperor the male lead is going to kill?! On top of that, this male lead is the prince of the enemy kingdom that is being imprisoned by him at this moment…. Feels like he just took a step closer to death! No way! In order to live, I must please him, but I never knew that it wasn’t just simply hatred between us….

A fluffy story about a coworker who can't express her love for her subordinate.

Hotta Youta is killed while returning home from work on a cold evening. He wakes up being carried by a bunny-eared woman! Featuring Reincarnation, Guns and Harem, its a Gun vs Magic Story that gives Hotta Youta a new life... and an edge!

From MangaHelpers:

After a god screws up and accidentally takes high schooler Shou's life, he offers him reincarnation with a gift to make up for it. Shou asks to retain all his old memories for the new life. Shou is reborn as Will, a noble's son in a world where magic use is common and involves knowledge of kanji characters. With all his memories, he's a brilliant toddler, and when he experiments with magic, he finds that he has an amazing talent for it! What's more, though he was smart but unloved in his old life, in his new life he has a mother and a father who both love him deeply. His future as Will is looking very bright! [tethysdust]

Ako was an ordinary school student until she suddenly remembered that she was a demon in her past life...Then she finds that the angel who brought about her death in the previous life has also been reincarnated. And he is none other than her present boyfriend, Yoshi. Ako decides to retaliate against her enemy of her past life, but unfortunately, she cannot evade her attraction towards him! Can she be successful in getting her revenge?

Unoki-kun, a boy who's been bullied since elementary school, ends up becoming the exclusive errand boy of the top delinquent of his school, Toramaru-san, who told him "Be mine" right after entering high school. But the truth is that Toramaru-san meant it as a confession of love!! This is the beginning of a love misunderstanding between Toramaru-san who thinks she's in a relationship and the beta Unoki who think he's being bullied.

Poisoned to death by her own betrothed?! Eunha didn’t wake up in a novel’s story just to get killed off again as an unfortunate extra! To change her story she needs a cover… 6 months pretending to be the fake fiancée of the novel's male protagonist, Duke Noah Wynknight. But will this cold-hearted, angel-faced demon of a man really help her avoid another ill-fated ending?!

Egil, an S-rank adventurer who has lived hateful of "slave", falls in love with one slave at a slave auction he was forced to bring.
She was Eleanor, the former third princess of the Kingdom of Cornelia.
Eleanor, a slave to Egil, begs Egil to "kill my childhood friend who sold me to a slave trader"! !!
Keep an eye on the estrus slaves if there is a chance! Can Egil rescue the body and mind of beautiful girl slaves and bring peace to this world ...!

Chateau, a headhunter from the organisation of bounty hunters, met a mysterious person named Son Ryang-Ha while on one of her missions. After their quite violent confrontation, Ryang-Ha got suddenly interested and asked her for a number. And thus started a game of cat and mouse, in which the hands of the participants are fully covered in blood...

Ryugasaki-San in my class is a lizard-man, and as such she will shed several times a year. It appears that such a time came, and sooner than i expected.

I was reincarnated into the body Cecilia Silvie, the villainess of an otome game.
According to the plot, what awaits me in the normal route is either a slow, painful death or an instantaneous one... Essentially, every route leads to my demise.
Then I'll change my fate! And that's why I decided to become a man.
However, I made a mistake during a certain event, and the story began to head down an unexpected path...?

Satoko Tawada is an office worker. She's almost 30 years old, but she still hasn't been able to find happiness in her life. Fate brings her with Mashuu Hayami, a beautiful 12-year-old boy whom she finds practicing soccer all by himself in the park. Out of a whim, she decides to help Mashuu with his practice, with her knowledge of soccer at her disposal. As they practice together on an everyday routine, the two eventually develop an emotional bond. When Satoko's ex-boyfriend deceives her, Mashuu gladly comforts her. And when Satoko learns of Mashuu's mostly absent parents, she starts to concern herself with his personal life. The two lonely souls find common ground and develop an emotional bond that transcends their age difference and circumstances. With this newfound bond, new feelings start to sprout within Satoko. Are these feelings that of maternity? Or is it something else?

As a precocious child, Lycoris suffers from a strange sense of déjà vu. On the day her father told her about her fiancé, she realizes that her fiancé was actually a character from an otome game she once played in a previous life.

"I am the heroine's rival from that game? And in the bad ending, I get stabbed to death? What a joke."

A story in which the protagonist is determined to avoid a yandere situation.

19 year old Reikan Yuuki moves into an apartment that's supposedly haunted by a female ghost. And sure enough, said ghost shows up at night to get rid of him, but instead of running away in fear he joyfully introduces himself to the puzzled ghost! After all, the only reason he moved in was to meet his fated (ghost) person!
A love comedy between a college boy with unusual preferences and a shy ghost, begins!

Izumi Maya, a 33-year-old professional pastry chef, who went out to buy some mustard, gets caught in an accident. When she regains consciousness, she has been reincarnated as a 12-year-old princess! On top of that, she also has a husband who is older than herself! And a king, no less!
Maya realizes that she's in a position where her life might be targeted, thus, decides to try to get along with her husband to protect herself!
In the name of a pastry chef, I’ll defeat the criminal and my husband’s stomach at the same time!!

When I opened my eyes, I was inside a fantasy novel world!
The beauty I see in front of the mirror is the future tyrant's older sister, Alicia!
She's not even a protagonist or an antagonist, but a character that doesn't appear much and gets beheaded by the (upcoming) tyrant little brother.

My life is all about escaping that fate from the novel.
In the end, I seduced the male lead's merchant friend who also doesn't appear much and was about to leave the country with him.

How-e-ver.
The face of the man who spent the night with me was extraordinary.

"I-I'm pretty sure the name I heard yesterday wasn't that name but something else. Uhm, what was it. I-I think it's Sir Lancelot."
"Ah, that's my friend."
"..."
"Why, is there a problem?"

Excuse me, you're asking if there's a problem? A lot. There's a lot.

…. Why is the male lead on my bed!

Hari, a destitute girl, got adopted by Duke Ernst at 7 years old when she lost her mother, as the Ernsts had themselves lost their youngest daughter Arina and sought Hari due to her resemblance to the late girl. Even though she received all kinds of persecution by the three Ernst sons in 20 years of life at the Ernst estate, she could finally escape that blood-and-tear inducing life when she was about to get married.

But what is this?
When I woke up from my sleep, I'm back to that hellish childhood! Is this a dream?!

Hmph. If I can't wake up from this dream,  I'll at least live without too much consideration for others now!

Just like that, Hari decided to go astray. Eugene, the "dutiful son" but cold, Cabel, the roughhousing knucklehead, and Erich, the angelic-looking bully and Arina's twin, all three be damned!

Upon opening my eyes after a bus accident, I found myself in the fantasy world of a webnovel I enjoyed reading... the only catch is, I reincarnated 20 years before the novel begins! Reborn as Princess Yerenica of the small Lebovny kingdom, I'm determined to change the future in order to prevent the series of unfortunate events that will soon occur.

In the original story, my older sister, Tejavia, is pregnant with the future female lead, when she's suddenly kidnapped by the Belgoat Empire's emperor. But in my desperate attempts to protect her, I got kidnapped instead!

And as if that wasn't bad enough, my body is ridiculously weak to magic. But... strangely enough, whenever I'm by the emperor, I feel fine!

The only way to save the emperor, who's destined to die at the hands of his own son after marrying the villainess, and save myself from being afflicted by magic... is for us to marry!

"Marry me, Father."
"Father? Princess, I haven't married yet, nor do I have any kids..."

Life isn't going too well for Yuzuki. She's a 34 years-old and without a boyfriend. The elementary school she works at is close to firing her, and to top it off she doesn't know what to do with her life at all.
But even when she quits her job and tries an arranged marriage, things don't work out. Only the bread she eats at the small stationery store around the corner gives her comfort. So one day, she asks the store owner to marry her on a whim, and to her surprise, he agrees?

Chu Feng was an Assassin. When he was on a mission, he failed and was hunted to a corner, so he jumped down a cliff. After his death, he entered the underworld. He spent 500 years and became the most powerful in the underworld. He became the most powerful demon called Demon King. 500 years in the underworld, his only desire is to return to earth and meet his lover, and manages to destroy the pearl of death in order to return to earth. But on earth, it turns out that there is a little girl who has been waiting for him...