There was a time when there were ninja serving the powerful, hired for intelligence missions, destruction, or assassination. While the times have changed, the need for ninja has not vanished. In a particular school, there are girls who are secretly in training to become ninja. Ninjas-in-training, Asuka, Katsuragi, Hibari, Ikaruga, and Yagiyuu each have a secret technique scroll that they protect at all times. This features their tumultuous school life as they pursue the path of the ninja!

Strawberry Marshmallow follows the life of Nobue Ito, her younger sister Chika, and her friends Miu and Matsuri. The basic premise of each episode can be summed up as "cute girls do cute things in cute ways," be it trying to quit smoking, going outside to play, sleep over, etc.

After tomboy Haedam is thoroughly friend zoned by her first love, she's determined to glow up before college. But when she makes the wrong impression on her first day of school, she realizes she needs the help of her reluctant neighbor. In exchange, she promises to put up with their living circumstances and keep his secret. What could possibly go wrong?

I reincarnated into the world of an otome game as the villainess, “Ophelia.” I thought I'd be able to enjoy a peaceful school life, but to my dismay, I found myself subjected to constant harassment at the hands of the wicked, vindictive heroine; and to top it all off, I’m plunging headlong into the dreaded Bad Ending — hold up, as if I’d meekly submit to such a fate! If that’s how it’s going to be, I’ll tap into the top secret "cheats" known only to those who've played the game and carve out the 'Villainess Route' of my fantasies!! But for some unfathomable reason, the capture targets seem to be doting on me far more aggressively than in the original story…?
Original Web Novel: https://ncode.syosetu.com/n0411fu/

“Hey Kuroya-kun, do you like me?”
“How did you know!?”

Unrequited love. What a shame for Kuroya, a gloomy student in high school.
The other party is Kasumi Shiramori, a senior in the literature club and a transcendentally beautiful girl. While spending time alone in the club, I should have hidden this feeling for a long time…!
Senior told Kuroya in desperation.

“Then -? Want to try dating me first?”

There’s no way a relationship exists in the minds of these two!? No, wait, it should be like this-
Both the feelings and the super-sweet romantic comedy of youth are full of faintness in the misery of a longing senior who is teased despite being in a relationship!

Ooyama Takeru, a young normal yet perverted minded guy, got accepted and now goes to a school that, unknown to him, was where combat and magic is used. On the first day, he meets again after three years: Amaya Haruko, his childhood friend, Kushiya Inaho, a girl who says she's his fiance, and Himegami Kodama, a blonde who wants to kill him. Finding out that there are many girls there that just don't like him, he is told that everyone there uses a special magic ability while using an item or weapon called a Maken. Later, he finds that no Maken is acceptable for him and doesn't know what to do, since in this school the students get into duels that showcase their magic and combat power, to which he seemingly has none.

Two girls who want to become idols are entering into their long dreamed school—Kiraboshi-juku—Kiraboshi Nadeshiko and her close friend Mangetsu Sakurako. These two are so close that despite both being girls, they're often compared to a married couple by people around them.

And so begins their life in the dormitory as roommates. However, on their first night, an unusual, illicit impulse strikes Nadeshiko...

From MangaHelpers:

After being kicked out of the main dorms for bringing in a stray cat, Kanda Sorata is forced to live in the smaller Sakura Halls where problem students are sent to live. Although he doesn?t mind his roommates, Sorata can?t wait to move out of Sakura Halls. But when Shiina Mashiro moves into the dorm, everything changes. Mashiro is an artistic genius who, at a young age, won many awards for her skills, but due to her childhood being so focused on art, she has no common sense and social skills. Forced to take the role of taking care of Mashiro, Sorata learns about himself and begins on a path of self improvement.

A young high school couple out on a date saw what looked like a falling meteorite, and inside, they discovered a little baby girl! The two of them married and adopted the girl, who they named Morumo, as their own. The only problem with this feel-good story is that now, as a high school freshman, Morumo is 16.4 meters tall!

Morumo still has a pretty happy life. She's popular with locals and tourists alike, and she goes to school everyday with her childhood friend Miharu. Then one day, a mad scientist, who specializes in experimenting on young ladies, injects Morumo with a serum that reduces her to 1/10 of her normal size. Her weight remains the same, so she is super-dense and tough like a superhero. Suddenly, it seems like all the joys of an ordinary life are within her grasp!! Sadly, the serum's effects are temporary and soon Morumo returns to her giant state.

But now that she knows a normal life is possible, Morumo is not going to give up! Even if it means she and Miharu have to allow a mad scientist to experiment on her, surely the ends will be worth the means!

The purported advertisement from the Jump Square issue says that everything in The Prince of Tennis up to now has been a "prologue" and that "a new legend for Ryoma and the others will begin."
50 middle school players have been invited to participate in the All Japan U-17 Selection Camp. Ryoma Echizen returns from the U.S to join his teammates and rivals.

-To Be Added-
Still don't know what this is about but its possibly something about school and romance etc etc
But what I cn tell you is that it has a cute girl on the cover which is nice

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At Academy Island, everything is settled through "Games" waged for a certain number of stars, with the strongest student being granted the ranking of Seven Stars. Hiroto, a transfer student, unexpectedly beats the strongest empress and becomes the pseudo-strongest in the school! A mind game of lies and bluffs begins!

"Hey, boyfriend, how you doing?"

Souta Sakuhara is a first-year high school boy. His first ever girlfriend has just been stolen away from him by a "girlfriend." That girlfriend is Shizuno Mizushima, a tomboy who's also the tallest girl he's ever met, who's now his hated rival in love, taunting him with it. But then…

"Since nobody else wants to be your girlfriend, how about you go out with me?"

She suddenly pins him against the wall! She also started saying, "Give me a month, and I'll make you fall in love with me…… I'm not going to let you go so easily!"

A one-way romantic comedy in which a handsome and beautiful girl will tempt you every day!

Billionaire Tono Ryuichi, the President of Tono Foods Group, a giant food company, recently acquired two young female assassins from the Mexican cartel. Sui and Ai came from unimaginably poor childhoods and were given a choice between killing people or selling their body. They chose the former and went through an inconceivably extreme training and, at 17 years old, they have become one of the deadliest assassins in the world. They are absolutely obedient to their master and they are given the task of finding the killer that poisoned Ryuichi´s wife and child. They begin attending high school to blend into society and, at the same time, read and study which helps them become even more deadly on the field. Sui and Ai encounter Matoba Imari who is a high school assassin herself and may be more skilled than both of them. But unlike the two, Imari just wants to lead a normal life. Whatever Imari wishes for her life is not their problem, because the only things Sui and Ai feed on are bloodthirst and a challenge.

The overly serious vampire, Chitose's first love is her childhood friend, Santa. But when she sucked his blood, she realized. There's no way I have a fetish like this...!?

There are animals that were abandoned by Dangun and live secretly in the human world. Narae, an ordinary high school student, discovers their existence...
A modern version of Beauty and the Beast with comedy and exorcism action.

‘Will the project of becoming human, for the animals that could not become human, be successful?'

At a handshake event for the Pure Idol club, popular idol Karen Amemiya is cut by a male fan with a knife. Half a year later, high school student Nina Kamiyama is the only girl at school who wears the uniform pants instead of a skirt, and is disconnected from her classmates. A teacher then announces that a suspicious person has been going after high school girls recently, and female students should head home in groups. However, Nina ends up leaving alone, and suddenly a figure with a knife appears out of nowhere!

The Gyaru sitting next to me is always sucking on a candy (or lollipop). She makes a "lero-lero" sound with her long tongue, as if she's trying to provoke me!

Any healthy boy going through puberty would look at that with a perverted eye, right?! Don't look... Don't look, me! If she finds out I'm looking at her in a lewd way, my school life is over...!!

Asakusa Midori wants to create an anime, but she's too disheartened to make that first step by herself. But by pure chance, she meets Mizusaki Tsubame, an up-and-coming socialite secretly dreaming of becoming an animator. Together with Midori's money-loving best friend Kanamori Sayaka, the energetic trio slowly work towards making their "ultimate world" a reality!

Akihiko Shimura, 20 years old (male). When I woke up in the morning, I was a little blonde loli.

A very ordinary and serious high school student, Kamou-kun.
Though his days are filled with diligent study, his concern lies in his childhood friend, Katabami-san, who interferes with his studies every day. And to make matters more complicated, Katabami-san's true identity is... a fox spirit!?

The struggle between Kamou-kun, who doesn't want to be bothered, and Katabami-san, who craves attention, begins anew today!