A teacher is looking for a school by the name of Seishou Academy, as he is a new transfer teacher for that school. Seishou Academy is known for having students with excellent marksmanship. However, he gets lost along the way and decides to look for someone who knows where the school is at a summer festival. He encounters a girl at a shooting range and finds her marksmanship skills to be professional. The girl tells the new teacher that she is an assault rifle, not a student. Her name is FNC and is an assault rifle of Seishou Academy. The new teacher attends school the next day to find students, including FNC, practicing shooting M16s and realizes that he has come to an unbelievable school. How will his experience be at Seishou Academy?

A woman gets hit by a truck and gets sent to the world of an otome game that she had played earlier that same day. However, instead of reincarnating into the main character and focus of the harem, she is fused into the soul of the game's antagonist, the protagonist's rival, and recalled this at the moment she is about to be sentenced to a "bad ending:" isolation in a nunnery.

It was surely not love, but it was definitely love. One day, high school student Seiya Maki fell in love at first sight with a bad-looking lunch box prepared by the most beautiful girl in her class, Arisa Asahina. "I want to eat your lunch, so I want you to go out with me". Arisa feels ridiculed by his confession and angrily rejects Seiya, but she is gradually drawn to his unabashed innocence and the kindness with which he accompanies her through her troubles. However, one day Arisa discovers Seiya's secret that he can't tell anyone... Where will their relationship go, and why is Seiya attracted to Arisa's bento? Sad, bitter, loving and beautiful. A coming-of-age story.

7 years ago a strange disaster occurred in the 24th ward when laws of reality were distorted in that area. Our main character is a high school boy who lost his little brother. Can Hanako-san from his school help him find his sibling again?

But more importantly who is this Hanako-san of the 24th ward?

“The Hero defeated the Demon King in the war of men against demons…” Those kinds of stories are a thing of the past. Nowadays, adventurers, demons, Heroes, Demon Kings, and so on are all occupations that no longer involve putting one’s life on the line. Peace has returned to the world, and dungeon exploration has now become a form of entertainment. Adventurers and monsters now all fight using clones they’ve created with magic in an extremely popular form of dungeon clearing where nobody dies. The footage of the dungeon getting cleared gets broadcasted all across the continent, and I’m a member of a Hero’s party that was ranked the 4th most popular in the world… but not anymore. Parties had a limitation of 5 members, and I was told that an unpopular job like Black Sorcerer would only get in the way of getting to 3rd place or beyond.

Now that I became unemployed, I was forced to find another party but I just couldn’t find one. One day, I encountered a beautiful blonde red-eyed woman who told me she had a job for me. After being so touched from having someone recognize my abilities far more than my past comrades, I ended up agreeing to take an interview without asking for the details. When I arrived at my destination, I was at the world’s hardest dungeon where no party has ever reached the final area, the Demon King Castle, where the Big Four and the Demon King were waiting for me. This is the story of a Black Sorcerer that was kicked out of a Hero’s party and joined the side of the Demon King Army to repel the Heroes. (Source: Novelupdates)

Or
Please read the title again.

Artist's Twitter (NSFW): https://twitter.com/kana_kkn
Orignal webnovel: https://ncode.syosetu.com/n4836fm/

A food-loving tattooist, YooJung. After losing consciousness due to a sudden accident she opens her eyes to find herself possessing ‘Sylvia’, a character from the novel she read. In addition, she happens to meet ‘Felix’, the hero of the novel, who, due to the abuse of his stepmother, suffers from anorexia and will soon turn the continent into blood. In order to eat more delicious food, to cook more easily, Sylvia inscribes magic circles on to her body. The new magic circles that are born through her fingertips bring a new breeze to the continent where magic-beasts are rampant.

In the 13th century, the Mongolian Empire rapidly expands across the globe. Later historians who studied the prophecies of Nostradamus would say that Mongolia was the birthplace of the "Great King of Terror," Angolmois. And at last, the force of the Mongolian Empire would turn their attention toward Japan... 1274: The Bun'ei Invasion. The exiled samurai Jinzaburo Kuchii is in Kamakura when he finds himself face to face with this invasion.

This story is a fresh look at the great battle that rocked all of medieval Japan: the Mongol Invasion. It shows how the people of Tsushima panicked, struggled, and eventually rose up against the overwhelming forces of their enemy.

Goblin Slayer Gaiden 2: Tsubanari no Daikatana is a spin-off series of the main Goblin Slayer! light novel. This is the manga adaptation of the light novel.
Set 10 years prior to the original series, the story centers around Sword Maiden's party of six adventurers on their journey to the Dungeon of the Dead to kill the Demon Lord.

A series of side stories focusing each of the Gold Saints from Saint Seiya: The Lost Canvas exploring their lives, mostly events which occurred before those of Saint Seiya: The Lost Canvas.

The stage; a city where "witches" collect people's worhship. Who appeared there was a man carrying a coffin, and a girl with a beast's eyes. Their prey, "Witches"! And nothing else. When the evil "witch" and the starved "beast" meet, their magnificent and fierce battle begins!

The fate of a girl in a BL novel is a tragic one. Girls are either vaguely helpful, evil, or add nothing to the plot. So what happens when you turn into the older sister of a BL novel protagonist? The older sister who dies a tragic death at the hands of a madman who’s infatuated with your younger brother? You go with your gut instinct: hide him. Hide your brother from everything, especially men, that could harm him and you. That’s the task that Kyla Vesta is set with in this life, and a task that she’s determined to complete.

An owner of a flower shop has a deficit management, then he encounter the forbidden plant cannabis.

I’d been stanning the hero for 3 years when I was suddenly caught red-handed by his tyrannical doting father, Duke Hades Louvremont.

“Ceaseless pursuit, expensive gifts, and now you’ve come alone all this way up north with no regard for your life…”
“I’m sorry. I have no excuse.”
“Alright, I’ve lost. Your devotion is undeniable.”
“...You think so too? Even I admit that this is the pinnacle of devotion.”
“Many women have pursued me, but none as persistently as you. I stand amazed. Let’s hold it, then. Our wedding. As soon as possible."
“Ha... Yes, I’ll accept my fate.”

Silence.

“Wait, pardon?! What?”

What did he just say?
Surely I must've misheard?
But the duke, smirking at my shocked face, gave the finishing blow.
“I said, I’ll marry you.”

Wow.
The hero’s dad has an inflated ego.

Earth ends up in a worldwide death game where everyone from the ages of 15 to 29 must participate. In this 20-round death game, Ryu Min stands alone at the entrance of the last round. However, the game taunts him, killing him for having not met the entry requirement of a minimum 5-man party. Now, on his 100th and final attempt, he uses the information he learned from his previous 99 attempts to help raise the necessary companions to reach the end. Can Ryu Min finally beat the game, or will he perish in his attempt?

From StarryHeaven:

Yuurin, the daughter of a low ranking government officer, came to the royal palace after hearing of a job with higher wages. However, that job is to act as the bride of Haku Reishou, who is feared as being the ruthless and heartless "His Majesty, the Wolf". In the royal palace where conspiracies swirl, after learning His Majesty's secret, Yuurin ends up stuck being his temporary bride...?!

Tea for Universe, Tea for Life. It's the Sengoku Era, a time when warring daimyou usurped each other constantly. There was a man whose soul was overtaken by the ways of tea and material greed as he worked his way up toward greater power and status. His name was Furuta Sasuke, a vassal of Oda Nobunaga. With his world broadened by the genius Nobunaga and with the spiritual insight learned from Senno Soueki, Master of Tea, Sasuke travels the road of the Hyouge Mono, or comical fellow.
To live or not to live. For power or for the arts. That is the question

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Aruna is the princess of B Kingdom. One day, it is decided that she will marry the king of E Kingdom, a country known for it's bloody conflicts. This is the tale of a girl who carries secrets and ambitions, and a game in which love, pride and life will be played.

The World consist of the upper, the middle, and lower classes.

Those who are wealthy live in the Town.
Those who are poor live in the Fields.
Those below, in the thick and gloomy Forest....

In the Fields, Takaoku Restaurant's show girl, Kiyoko, supports her mother by managing the food preparation. One day, a regular patron named Tanaka, who recruits day laborers for the underground, requests that they bring meals to an assassin from the Forest called "Yorukumo," or "Night Spider."

Yorukumo was born in the Forest as a disposable child, raised to be void of emotions, unable to feel pain, and without knowledge of reading and writing. With Tanaka's instructions, he easily handles assassin jobs daily. When Kiyoko and Yorukumo meet, the World begins to come apart a little at a time.

Violence, abduction, extortion, drugs, blackmail… This gang will do literally anything for money.
One day, they kidnap a young girl, physically and mentally destroying her in the process. Seeing what was done to his beloved daughter, the girl’s father loses his sanity, his anger turning into an obsession to find and torture every member of the gang, to ensure they die in the worst imaginable ways. Fires of revenge rage in his heart, and keep escalating. How will this tale of revenge end?

A spinoff of Ore no Imouto ga Konnani Kawaii Wake ga Nai following Kuroneko's route. This manga is a new story based on volume 15 and 16 of the Oreimo lightnovel written by the original author Tsukasa Fushimi. Not to be confused with Ore no Kouhai ga Konna ni Kawaii Wake ga Nai, which is another spinoff.