The creature known as man is quick to misunderstand.
The same applies to the the pure middle-schooler Yokoyama-kun: A diligent fellow who does his infirmary duty properly.
"You're so nice. Thank you." The one to say that to him was his classmate Nishino-san, so Yokoyama-kun ended up thinking: ("Isn't she only nice to me?!")
He couldn't help but be hopeful. ("Does she like me?!")

This is the start of the misleading life between the fantasizing Yokoyama-kun and the equivocator Nishino-san.

A story between the Sea and the Earth. Childhood friends Hikari and Manaka, who live in the sea, together with their friends Kaname and Chisaki, are forced to attend school on land after their own undersea school is closed. But due to a special encounter, their lives gain a new twist.

From MangaHelpers:
A new program has been set in place for a certain area, where children are separated by gender into eastern and western territories. They're raised with no contact with the opposite sex, and made to only focus on their studies. Of course, there are a few bad apples, and the worst of these are sent to a co-ed school with the troublemakers from both sides. Unfortunately, this school soon became known as a place where the teenagers would battle to determine who was the strongest, and many boys and girls tried to be sent there.
At this school, the girls have an advantage, since the boys mysteriously get nosebleeds whenever they look at them. However, the strongest girl, Jun, is shocked to find that the strongest boy, Kyo, doesn't get a nosebleed when he looks at her! It turns out that both of them have had some experience with the opposite sex in the past, and they both have embarrassing secrets in the present.

A hero is made of H (ecchi) and Ero.

Love filled with murderous intent-- When Kamishiro Taku met his unrequited love Hanasono Mika, he saw a vision where he tried to murder Hanasono by stabbing her throat with an umbrella. In a harsh and cruel world he lives in, will his defiance bring him hope or despair?

Nalgore has been appointed as a mid-level boss by the Demon King and has arrived at the remote dungeon, "The Cave of Shijima".
The workplace conditions in this dungeon are poor, and the employees (monsters) are completely unmotivated--?

An exhilarating rebuild fantasy about a middle manager and his subordinates that starts from the worst possible place!

Oomugi Wakaba inherits a mansion from her late great-grandmother, an expert pen artist. Within a hidden room, she meets the mysterious blue-eyed girl wrapped in crimson chains, Red Riding Hood. Together with the strongest beast, she comes to learn about the world of magic, witches and grimoires.

In Alternative, Takeru wakes up three years after the end of Unlimited to find himself back in his room. Although he first thinks that everything that had happened to him was a dream, he soon feels that something is wrong, and leaves the house to find that he has been sent back in time to the beginning of the events in Unlimited. Unwilling to accept something like Alternative V, he decides to help professor Kouduki to complete Alternative IV and save mankind.

From Viz:

Pokémon comics based on the original Game Boy games... not the TV series!

POKÉMON ADVENTURES includes all the Gym Leaders, places, and opponents from the game. There's plenty of action as trainers named Red and Blue explore forests, jungles, cities, and caves in search of Pokémon and excitement. But can they foil the schemes of Team Rocket, a mysterious group of villains who want to use Pokémon for evil?

Vol 1-7: Red, Green, Blue & Yellow
Vol 8-14: Gold & Silver
Vol 15-22: Ruby & Sapphire
Vol 23-25: FireRed & LeafGreen
Vol 26-29: Emerald
Vol 30-40: Diamond, Pearl & Platinum
Vol 41-42: HeartGold & SoulSilver
Vol 43-51: Black & White
Vol 52-ongoing: Black 2 & White 2

The year is 1863 as the tumultuous samurai era is coming to an end, Japan is split between the pro-shogunate and anti-shogunate factions. The fate of the world is threatened as an army of historical revisionists are sent from the future to alter the course of history. In order to bring these forces down and protect the real history, two sword warriors, spirits who are swords brought to life by Saniwa (sage), rush to Edo. The polite and thoughtful Horikawa Kunihiro and the short tempered yet skillful Izuminokami Kanesada, who served the same master, confront the invading army along with a lively gang of other warriors including Mutsunokami Yoshiyuki, Yagen Toushirou, Tombokiri, and Tsurumaru Kuninaga.

As the fate of history lies in these hero's hands, what meets the blade is yet to be uncovered...

Tells the story of Sinbad's early life, when he captured the first Dungeon, Baal.

After the Hero’s birth, Seycred, the youngest priest of the church is sent to take care of an abandoned chapel right across the Demon King’s Castle, for it to serve as a resting place in his quest. Thus, begins the relationship between a priest and the Demon Lord. Was the person with the right ability sent to the chapel or will their encounter bring forth chaos to the nation?

Sixth story arc of JoJo no Kimyou na Bouken series.

The story of Jotaro Kujo's daughter, Jolyne Cujoh. She is framed for a murder and ends up in the Green Dolphin Street Prison. She is given an amulet inherited from her father, which cuts her hand and unlocks her Stand ability, Stone Free, which allows her to unravel her body into living string. The string can form a humanoid Stand within 2 meters of her body, and can extend further as string. In the prison, she soon becomes uneasy allies with fellow convicts and Stand users Hermes (Kiss) and Foo Fighters.

The previous life was a peerless genius in the world of immortality. He was killed by 3 celestial beings. He was accidentally reborn to his 20s by the book of heaven. All he wanted to do was to become an immortal and return to the immortal world, and he became the strongest man on the earth, turning his hands into clouds and covering his hands with rain, provoking anyone who defies him! He is the venerable one! The ruler of 3000 worlds! the guy who is 10 000 times better than Thanos! He is Taixuan Taizun! The Great Immortal!

The story of the four panel manga begins when the world is invaded by game developer Nihon Falcom's RPG characters, including characters from Ys, Sorcerian, Eiyū Densetsu Shikkusu Sora no Kiseki (The Legend of Heroes: Trails in The Sky). The characters come together in a crazy academy life in celebration of the game maker's 30th anniversary.
from ANN

After the outbreak of the unidentified virus "Lost Christmas" in 2029, Japan has been under the control of a multi-nation organization called GHQ. Ohma Shu is a 17 year old boy who has a psychic power in his right hand. He can use the power "Ability of King" to extract tools or weapons from his friends. He has been avoiding making trouble for others but his life changes when he meets a girl Yuzuriha Inori, a member of a resistance guerrilla group called "Undertaker", whose members pilot mecha weapons to fight against the government.

This is the story of a medicine peddler, his young son, and their life on the road after losing their beloved wife and mother. A father who never managed to grow close to his child as he was often out doing his trade soon finds himself learning many things about life, love and family.

Stress, obesity, baldness… Tackle any parallel world person’s health problems with a delish!
A registered dietician, Asayama Touya suddenly got sent to another world together with his little sister one day.
After that, He stumbled upon a restaurant called "Healthy Kitchen", and found out that "all healthy food" tastes bad in that world...

"A tasty, yet healthy food is just a pure fantasy."
That's what most people in Miliasky thought, the country where a Registered Dietician, Asayama Touya found himself transported to.
Even though he was lucky enough to be sent to a world with good public order, and didn't have any trouble procuring any ingredients nor cooking tools. Since science research didn't really advance well there, the concept of "Nutritional Balance" wasn't really well received there, which in turn made them think that it's normal to eat whatever they like.
But then, he found a restaurant called "Healthy Kitchen", the only place that seems to serve "food that's supposed to make you healthier," in a world with such loose views on nutritional balance.
However, what actually served to Touya, who anticipated some awe-inspiring another world food, was something that is far from what he expected...
With his Dietician Knowledge as his weapon, will this ex-office worker be able to turn around the entire norm in the another world!?

-Source: Bookwalker

Tsuji-kun, what kind of girls do you like?

The story centers around a lazy girl's love for famous literary works along with her bookworm friends. Sawako "Miss Bernard" Machida wants to be well-versed in literature but she doesn't actually read those books! Encounter various prominent works including the Bible, The Tale of the Heike, The Great Passage, Fermat's Last Theorem and more that she hasn't read.