The story takes the place in the world where using the magical powers is natural. Hiasen, the son of Ran, is raised by the powerful wizard, Kasin, who is also a friend of Ran. The story begins with the time when Hiasen asked Kasin to send him to the school for a gift of Melly Day (February 29th, comes in every 4 years).

From Twilight Scans:
The story of Kim JaeHan starts now! A dad who only has eyes for his daughter faces a sudden death. His mission is now to protect his daughter DaHyun from the 12 bullies by using his powerful character from webtoon drawing when he was once alive! As a dad, he'll never let his daughter get bullied. If he sees this?... he won't let those bullies alone. Whoever touches my daughter, you're fucked.

One day, a giant monster in the shape of a bug appeared over the world… with only the "Children of the Butterfly" to fight against it.

While Dokgo Rewind is the prequel to Dokgo, the latter series should be read first.

Revenge~Sure is a sweet thing!

Her ability to detect lies has made her an outstanding officer of the law – despite being haunted by her inability to save the ones she loved from a gruesome fate many years ago. Now, she uses her powerful gift to defend the defenseless at any cost – even if it means teaming up with a deadly assassin to fight evil in a world gone mad.

After Kang Hu’s death from bullying, the family was torn into pieces. His younger brother suppresses his resentment and heads back to school. The story begins exactly one year after Kang Hu’s death when his brother seeks to destroy the delinquent circle

"To pass time before surgery, Hwayoon read a romantic novel for some steamy scenes.

Little did she know this would lead to her reincarnating into the story as an insignificant maid that's executed soon after. The goal is to survive, but things get out of hand... and steamy.

Kang Haru, also known as Kay-D from the popular idol group ‘Miracle Knights’, is running away from his life of fame… but what will he find on this charming little island?

After watching a video with frightening images, Our protagonist tries to live with a small curse...

Lee Yooshin went to try out a new virtual reality game. However, it wasn't just a game. It has a 100% assimilation rate! A game world where everything feels eerily real- In the endless cycle of death and resurrection where logging out is not allowed, Yooshin prepares to fight. In order to escape the hellish battlefield from which there's no escape...

I transmigrated inside the novel of my favorite character, the second male lead.
A tsundere who listens to all the words of the female lead while grunting, with a straight forward personality, and a handsome face.
Matching all my preferences, he was even single after the ending.
Nice! I’ll pick up the second male lead!
However, I overlooked one thing…
The tsundere, who had been abandoned by the female lead blackened, and had become a terrifying man!
“Get lost.”
…I-is it safe for me to pick up the second male lead?

Based on the Original Webnovel (https://series.naver.com/novel/detail.nhn?productNo=4880443) by Hwang DoTol

Yunife Magnolia, a villainess friend of the heroine in this novel called Rael Cania.

The Yunife inside the novel has always loved the male lead, Ishid. To the point where she harassed Rael out of jealousy because she's loved by Ishid.

And thus, Yunife is destinied to die in the hands of the male lead of this novel.

But one day,

"Why did I become Yunife?!"

But let's think about it, it's still one year away from the time Yunife is going to get killed by Ishid. So, I have to meet Ishid and Rael first, I'll be able to find a way out of my death if I do so.

Yeah, let's meet them first!

But, this man is just so tender-hearted and kind. Would Junipe be able to escape from this man?!
this...???

Jaegun Ha is an unsuccessful novelist at 27 years old with nothing to show for himself. That is until he discovers a mysterious box of items and a cat in a graveyard! Now Jaegun is able to channel the extraordinary writing abilities of a dead writer named Gunwoo Seo, and Jaegun’s career is propelled to celebrity status. But with the perks of success come new challenges...

From Sunflower Scans:

A man whose time has stopped, and a woman who flows like a river.
Story about strife that comes and goes in the past and in the present.

Sungbin was ordinary, but after the death of his sister, he takes on the moniker of 'Neon Mask'. As Neon Mask, he becomes a psycho streamer and wages war on all gangs.

"A debt of blood must be paid back in blood."
"To avenge my sister, I will create an ocean of blood."

Jieum Ban has an extraordinary ability: she can remember the memories of all her past lives. After her previous life is cut short by a tragic accident, she sets out to reconnect with the people of her past life in her current one. Will memories of her 18th life sabotage romance in her 19th? Or will love endure across different lives?

The current generation of humans are often said to be called descendants of Adam and Eve. However, there lies a small number of a different type of humans in this world. Children of the one who is called to be Adam's first Eve - Lilith. Her children look completely the same as Eve's descendants, and the few who live among us... are still somewhere in the world.

It’s been many years since I’ve bloodied my hands for the United Empire and its emperor, Ragnar. I wanted to return to my hometown and live a quiet life as if to repent for my sins.

However,

“You are a great 8th class magician who is able to overthrow me and the empire at any time”

“How could I let a monster like you stay alive?”

After being betrayed on the verge of death by Ragnar, who was my friend as well as my Emperor, He stabbed my heart with a dagger that had time magic applied to it.

“The redemption I want is to put everything back to its place.”

The beautiful goddess of fortune hidden by a rich man came into the life of the poor and unlucky guy....