From MangaHelpers:
Namidare Rekka has a very unusual birthright. After his 16th birthday, he will be drawn into many different stories. Each story has a heroine, and each story depends on him to be the hero. On his first day of high school, a strange uniformed girl that only he can see shows up. She claims to be from the future, and claims that his rescuing of many heroines is going to cause serious trouble for the future.
It's not long after this encounter that his troubles begin. His childhood friend Satsuki invites him somewhere, possibly to confess her feelings for him. However, before she can, she's kidnapped! Rekka wants desperately to help her, but he finds himself being tossed into various sci-fi and fantasy worlds, each with their own heroines in trouble. Will he be able to get back to Satsuki? Will he be able to save all the others? How can he really tell the consequences of his well-meaning actions?

Sasaki Kairi, an Omega, is a newbie employee working at a marriage conselling company.
His problems lie in his client – the handsome Alpha, Jinguuji Haruomi – who doesn’t seriously look for a marriage partner.
What’s more troubling is that, this elite tries to make advances at him at every opportunity!
Now, will Kairi be able to make Haruomi marry someone…?!

At his older brother's request, Kazuyuki went to teach English to the art teacher Kamisuwa-sensei. Somehow, it seemed that sensei was in love with his older brother... What was this gloomy feeling? ...To begin with, what is love? Do words come first, and then the physical comes after?

Teacher and pupil's hesitant pure love. The older brother's love story is a bit adult.

A spin-off of Doraemon, it is a story about how a baseball team comprised of futuristic robot cats and a human make their way towards becoming a great team. The author was an assistant to the author of the original Doraemon manga.

A blunt but kind big brother and the bright and innocent Ayoung live in apartment building 201, suite number 202. This is the story of the everyday life of these cute siblings and their unpredictable neighbors! Even today, with Ayoung All Day Jo Ayoung ♡

A very huge Parakeet and a middle school schoolgirl... What can go wrong?!

A naive youngster, ignorant of the tragedy that happened 16 years ago, travels with the sworn enemy of his tribe; a Princess out on an excursion, due to the internal conflicts within the royal family, has to risk her life and survive in the mountains; A prodigy carrying the hopes of the entire tribe, at this very moment, doesn’t have much time left in this world… The 3 of them meet in a world fraught with dangers, will they be able to free themselves from their accursed fate?

Michihara Yutaka likes to eat but afraid of gaining weight. Katsuragi Botan likes to cook and gives food. Chances let Michihara to sit beside Katsuragi, her crush, and Katsuragi just loves to give her foods! What will happen to her diet (and love)?

From Moss Scans:

In the multiplayer online game Glory, Ye Xiu, is well known as the Textbook level expert and a top-tier player. Due to a series of circumstances, he was forcefully expelled out of his professional team. After leaving the pro gaming scene, he resides at an Internet Café employed as one of the managers. When Glory launches the tenth server, he throws himself into the game once more, equipped with ten years of gaming experience, memories of the past and an incomplete self-made weapon. His journey back to the top begins.

After plotting and scheming, who took away my glory? Under the influence of the storm, my hopes will never be shattered. In its magnificence, the path will not be lost, for I, will return!

The manhua is based on the popular Quan Zhi Gao Shou novel by Butterfly Blue. The manhua is currently serialized digitally in Da Jiao Chong’s mobile application and is released on a weekly basis.

From Wikipedia: Enno Ozuno, Master of the Enno temple used the demon guardian spirit Zenki to defeat the demon goddess Karuma. After defeating Karuma, he later sealed Zenki away in a pillar until needed again. Centuries later, his descendant, a school girl named Chiaki Enno (役 小明, Enno Chiaki, or Cherry Night in some dubs) is able to free Zenki, although the demon currently has the form of a brattish demon child. To transform this extremely defiant demon into the form that made him useful by her ancestor, she uses a bracelet that appeared on her wrist when servants of Karuma broke the seal that imprisoned a seed of Karuma. Zenki appears because the seeds of Karuma (which look like eyeballs) start appearing and turning people into monsters and Zenki needed again to eradicate this menace.

Twin sisters Airi and Himari have always been very close, and worn identical hairstyles, clothing and accessories. But after they enter high school, Himari starts to drift away from her sister. When cornered by Airi, she explains that she has "a promise with senpai to fulfill," no matter what.

Bouida Haruto, a hardcore otaku with no interest in 3D (real) women, once appreciated figures from afar, accepting that "if you get into them, there's no turning back." However, when Nona, a character he loved from an anime called "Girls→Planetary Investigation" had a figure of her released, he ended up purchasing it. And then that night, the figure of Nona somehow came to life, and a couple-like lifestyle between man and toy began.

Shouta, a 25-year-old NEET, is mocked by his former female classmates who've all become successes, at their class reunion. A mysterious incident at the school pool throws him back in time and lets him deal with those same classmates back when they were fifth grade girls.

Tarou was just an ordinary university student until a strange old magician summoned him to another world. Upon learning that his newly acquired magical power is 8 million (8 million more powerful than an average magician), he uses his abnormally powerful magic to revive the old man that caused all this... in the form of a frog. Thus begin the strange adventures of a boy with ridiculous magical power and Kawazu, the former strongest magician, now revived as a frog.

The devil who lost its magical power in the fight against long angels fulfills the principle of absorbing the human soul and restoring its power! It was a demon king who traveled to the human world with a trusting four heavenly kings, but the destination that I reached was a solitary island of the ocean...! On that island where magic can not be used, a survival that can laugh backwards with the sadness of rulers and subordinates in the Makai begins!

The novel, “Re:member,” from the popular idol rhythm game makes it to comic format! The past of Idolish7's senpai group, Re:vale, is finally revealed! What hurdles have Banri, Yuki and Momo overcome before the formation of the group...?

The new stars of the era have risen!! This new era of J-POP starts with Honey Come Chatka!!A girl born to be a diva, Sachi!A perfect dancer with a body to match, Tayo!An unrivaled genius on the turntable, DJ Copy and Paste!Their biggest fans

Ren Kuon, who was known as a gangster, is the president of the student council in Ashitaka high school. With Yuusuke Akiba, the vice president; Koyuki Benten, the treasurer; and Anri Umebayashi, the secretary, he plans to hold the sports festival, which he likes, that used to be held every year. But on the festival day, uninvited people assemble in the back of the school and make trouble. So what will Kuon do?

Content with her ordinary life, Lyra is somewhat of a wallflower. However, her comfortable lifestyle suddenly goes astray when she accidentally plunges into the world of sirens. Entangled in a curse, Lyra will learn that her world may be a lot bigger than she had ever imagined.

From MangaHelpers:
Summoned into an alternate world of Alayzard, Ousawa Akatsuki helps defeat the demon lord, brings harmony back into the world and, under the demon lord’s last request, takes the demon’s only daughter back into Akatsuki’s own world.
It turns out that being teleported into a different world is somewhat of a common occurrence back home. Those who return often come back with the power to use magic. So a worldwide organization, fearing people like Akatsuki, created Babel, a school to teach and keep tabs on the magic users.
Akatsuki is able to bring the demon lord’s only daughter into Babel as his sister, Ousawa Miu. A new chapter for Akatsuki is about to begin--this time, in his own universe!