The main character is Kyoutarou's older sister, Ichikawa Kana… commonly known as Onee! She has lots of female friends, but of course she doesn't have a boyfriend!! Featuring that older sister, this is a regrettable romantic comedy that seems like it's going to start being a romantic comedy but doesn't!!

A "fearsome psycho-thriller" centering on "the dark side of adolescence." The manga centers on Kyōtarō Ichikawa, a person at the very bottom caste of his school, and who hides murderous impulse that lurks at the very bottom of his soul.

5 years after the world changed, the final boss appeared. [The final boss for area Earth, the Frost Queen, has appeared.] The final boss! If we can just defeat her, our lives will go back to normal! The top five players in the world, including Specter Seo Jun-ho, finally defeated the Frost Queen... But they fell into a deep slumber. 25 years passed. "A second floor? It didn't end when the Frost Queen died? Specter awakes from his slumber.

In order to eat me, my enigmatic stalker is protecting me from other strange women―

A high school boy, Sakurai, has a secret he cannot tell anyone: he has been plagued by stalkers since he was a child.
One day, his classmate, Ueda, suddenly transforms into a monster, revealed to be one of his stalkers.
Miyako, who has always been closely following him, appears and saves him.
She tells Sakurai that the monsters, commonly known as urban legends in Japan, are after him because they love him.
What will be the fate of Sakurai who is loved by countless creatures disguised as beautiful girls?

Links:
Author's Pixiv: https://www.pixiv.net/en/users/25451722
Author's Twitter: https://twitter.com/tadaresan

What makes a 'proper adult'? Inspired by the words of his late father, Yutaro Urashima sought to become an upstanding member of society by developing and strictly adhering to his own "Articles of Adulthood." Little did he know, however, that those same articles would go on to dramatically change the world...

When the planet perishes and the gods fall, the collapse of the magical realm leaves humanity without any protectors. Now, "Anomalies" and "Catastrophes" begin to invade the human realm . As the Dark Age descends, a soul from Blue Star (Earth) is unexpectedly transported into this dying realm.

On a harsh rainy day, a high school student without any particular special skills, Usato Ken got dragged into another world summoning with two others; a good-looking guy and a beautiful girl, both of whom he strangely started getting along with just today. As an especially talent-less individual that doesn’t stand out he internally thought that he would be treated as useless. However, the others were unexpectedly kind.

Usato who found hope in another world thought that, but the reality was different. He had a certain magical talent hidden in him and he was forced to fall into hell in the name of “training.”

A super-class dragoon group-Cyril, a boy who was banished from the S-class guild "Lindworm" for some reason. What he had hidden was ... the ability to "talk" with the dragons, which was unconventional!
Cyril who met unique dragons and launched his own guild. Perhaps because of its extraordinary qualities, the level of the guild soars at the fastest rate in history! Cyril, whose arm was recognized, will make a name for himself as a non-standard dragon knight.

Sakra, the last surviving princess of a fallen kingdom, is being hunted down for the power of Ambrosia she possesses - the ability to grant divine strength, but only to a human. With no human companion, she decides to summon one from another world in a desperate attempt to find a knight to protect her, but the man who answers her call is less than what she had hoped for.

Seonghyeon Han is a victim of a violent crime that left him with impaired legs and a fear of the outside world. Now, he faces an even greater challenge: while he gained the power to create clones, he has just 24 hours before being sent to another dimension.

As the countdown ticks down, Seonghyeon makes a desperate move -- he sends his clone through the interdimensional portal, and discovers his real body can remain safe at home.

Thus begins the epic tale of Seonghyeon's... clones.

When the Devil King announces his retirement, he calls forth his two sons, Yomi and Sora, to give them each a quest. Whichever of them finds a pure Yamato maiden within a year would inherit the throne of the Devil King, while the other would die. Thus begins Sora's sex-fuelled adventure to find a woman that can satisfy his father...
(Sakigake!! Otokojuku Wiki)

From Exertus Scans:
Millions of years have passed since the times of legends, when the worlds of man and gods were still the same. In these times it was the desires of man that moved the world. It is the era of the 500 year war: The warring states period. Kingdom is the story of a young boy named Shin who grew into a great general and all the trials and bloodshed that lead him there.

Note: Kingdom won the grand prize for the Tezuka Osamu Cultural Prize in 2013.
The manga also earned a Guinness World Record on December 12, 2012 for Manga written by the most people. The record was due to its "Social Kingdom" campaign in which fans and other artists were given the task of redrawing the entire 26th volume.

17-year-old Iguchi Tatsuya has just been released from juvenile detention and is on probation. He's been relocated to a new area, away from the bad influence of his old friends, and is under the care of his aunt. He is determined not to be sent back to lockup, and he works hard in his aunt's restaurant. However, he still has the same personality, the same tendency to violence, and still falls in with the same sort of people. It's going to be difficult for him to stay out of trouble

One day Kang Songhyun opened his eyes on the Azul Continent.
He didn’t know the reason.
When he woke up he was no more in South Korea.
He’s thrown into a fantasy world.
‘Why did I come to this kind of place?’

At that time, the status window pops up in front of him
[Your job is ‘healer’?]

But among his skills…
‘huh? …No healing?’
That was the beginning of the life of an unlicensed healer. A healer who does not know how to heal.

Kang Songhyun is good at everything except healing
In a fantasy world as an unlicensed healer his story of survival begins.

One day Mami realizes that she has magical powers. Her mother also had those powers, as well as her grandmother. Mami slowly has to learn to live with her abilities, and she gets into a lot of trouble.

Every time she opens her mouth, it's nothing but abusive language, and her problematic behavior never stops. The protagonist has had enough and sets a “plan” into motion…??!

On days when she is sick, on days when she has a tedious day job, on days when she has regular tests.

On days when she is too lazy to go to school, I am called upon.
I am a convenient substitute for the body of a girl named Sonao Aikawa, and that is me.
I may look exactly the same, but my personality is a little different.
I can't go out freely, I can't even make plans for tomorrow,
I am a replica whose mission is to work for the original.
I was supposed to be a replica, but I fell in love.

A very pure and slightly mysterious "love story" that takes place in a town by the sea.

After a prophetic dream foretells her sister’s death in a political marriage, Arasilla Hugo takes matters into her own hands and marries in her place. Her groom? Demian Vandermeer, the knights’ captain and the brother of her sister’s former betrothed. The only problem is that mages and knights are sworn enemies, and their sharp tongues and stubborn hearts turn every situation into a competition. Arasilla races to save her sister from a tragic fate, while Demian fights for the dukedom. Will their rivalry stay just that? Or will their contractual marriage burn into something more?

May I never be born again
Trying to throw yourself off the roof of the school
A boy, Ayumu, who lived an ordinary junior high school until half a year ago.
What pushed him to this point? And what is the true ending that awaits...?

As a child, I fell into a strange dimension in a dream.
In my dream, I was an adult, dressed in clothes I’d never seen before and wearing a ‘mask’.
‘Now, it’s time to roll the dice.’
And so the dream game that began with the roll of the dice, the ‘World of Eternity’, became my destiny and my life, perhaps even my world itself.
As I rolled the dice with mysterious, nameless people, I was happy and joyous.
Until I became a piece on the board myself.