Rito is a high-school boy who just can't confess to the girl of his dreams, Haruna-chan. One day when coming home and sulking in the bath-tub, a mysterious and barely clothed girl appears out of nowhere. Her name is Lala and she comes from another planet...

From Yen Press: If you thought the SOS Brigade’s adventures couldn’t get any more outrageous…you’ve never met Haruhi-chan! Nagato has gone otaku! Asakura is her pint-size prisoner/plaything! Mikuru’s so cute she turns into a sheep! You’ll find plenty of gags and guffaws as Haruhi dives into the world of four-panel and short comics!!

Based on a video game of the same name where the hero strips the clothing off the female vampires and exposes them to the sun in order to defeat them.

Hime Arikawa is a high-school boy with a huge debt, and he is saved by the girls of his school's student council after being chased down by yakuza debt collectors. The student council agrees to pay off his debt if he'll join the student council and spend his high-school life cross-dressing.

Included in this work are the following spinoffs:

• Himegoto +
Hime's younger brother Kaguya joins the public morals committee because he wants to save Hime from the clutches of the student council vice president.

• From Comic Rex and Febri

From Viz:
When goofy inventor Senbei Norimaki creates a precocious robot named Arale, his masterpiece turns out to be more than he bargained for!

This series helped launch Toriyama's career and was awarded the Shogakukan Manga Award for shounen and shoujo manga in 1982.

Having given a magical Tengu mask to a human boy when she was little, Tengu princess Arazunaya Jirou is told by her father to go get it back. Nariyuki (the boy), now a high schooler, doesn't want to give it back. Slapstick comedy ensues.

Masaki Masamichi has his heart set on joining the legendary manga club of Takidani High School. After all of his effort to get into Takidani High School and prepare for his club entrance, he finds out that a horrible change has happened to the club of which he dreamed. How will he cope with the disappointment of learning that his long-awaited club life consists of drawing ero-manga?

From Seven Seas:

Tor Kokonoe has entered the prestigious Koryo Academy, a high school dedicated to training its students to wield Blaze―individualized weapons that a student manifests. The future of a student is often shaped by the form their weapon takes, and when Tor’s appears as a shield, suddenly he’s the odd man out. But that’s when the Duo system comes in, a program where students are paired up. Teamed up with a silver-haired girl named Julie Sigtuna, Tor’s adventures at Koryo Academy are just beginning!

The demon king has awoken after his 500 years long slumber and he tries to destroy mankind. Now a little monk has to travel to look for 12 warriors with powers of the 12 Chinese signs to fight him.

After his mother's death, Miwatari Yuu returns from Tokyo to live with relatives in the city of his birth, Ousuku. Yuu is the latest of a line of Shinto priests that stretches back generations.
After his arrival, he runs into a strange girl who seems to be searching for the Northern Lights. Yuu saw the Aurora as a child, though no one believed him, and his mother had told him it was the armor of the Valkyries traced across the sky. Yuu's destiny is interwoven with this mysterious girl and the aurora, and he will not be able to help being drawn into a battle that involves both gods and humans!

Two decades ago, the dragons returned to earth. Soaring above the skies leaving behind trails of destruction. They attack humans for the simple reason, their destructive impulses. In order to fight the dragons, humanity acted. They began to dabble in magic...

A girl named Iwase Maho moves in with a family friend to make the commute to her high school easier, but something is off about her...

Tohru Fujisawa attends AKB48's 19th Member Selection Rock-Paper-Scissors Tournament held at the Nippon Budokan on the 21st September, 2010 and draws a one-shot from his POV as part of the AKB Observation Section. Titled Repoman Soul!, it showcases the soul of the fans at the AKB48 event!

Eraser, the mysterious enemy that invaded Earth 13 years ago!! Before their overwhelming power, the entire Earth neared the verge of collapse. But at the last moment there suddenly appeared Earth's lone savior, The Beast: an ultimate weapon uniquely equipped to counter the Eraser's power!! The Beast is part of the MAGIC Brigade, whose commander-in-chief is also the founder of our Le Prince Academy... Ladies and gentlemen, I present to you, Mr. Vincent!

From MangaHelper:

In a land far away, the evil demon lord ruled with absolute power and cruelty. But a group of heroes combined their strengths and conquered obstacles to finally reach the demon lord in a final fight. When the sorcerer cast the imprisonment spell that was supposed to trap the demon lord, it also dragged all the heroes into a different dimension.

The demon lord, who looks and acts like a teenage girl, has lost her legendary powers and is forced to rely on the heroes to find a way to escape the prison. The sorcerer, who is leading the search on how to break out of the spell, can’t help but to tease the now powerless, bratty and emotional demon lord that once was a threat to the entire world.

Every 666 years in the Demon World, a fight to decide the next King the "Demon King Festival" is held. It is a battle royal fought with demons paired with human sorcerers. The demon Aini, carrying the desire to be King in her heart, quickly responds to her summoning in the human world, but what awaited her was.

Meet Kimijima Sen, an aspiring manga artist who specializes in hot-blooded battle shounen genre. In order to polish up his techniques to achieve his goal of professionally debuting, he became the assistant of the pro manga artist Ikoma Agito-sensei. A not-so-normal high school girl who loves drawing moe manga, eroge and has an extreme fetish for beautiful girls and big breasts.

Together, they must work together to get their manga serialized.

Long ago, a powerful demon lord ruled over the people until an equally powerful hero rose up to defeat him. To counter future threats, Rosewood Academy, a school for heroes-in-training, was created. Today, Rosewood Academy enrolls only the best of the best, and Arnest Flaming is the best of them all. The top student in the school, a dutiful girl nicknamed "Empress of Flame," she has an irritating encounter with a light-hearted boy in the school hallway one day who seems to equal her powers, though she's never seen him before. He introduces himself only as Blade, and Arnest soon finds out not only is he transferring into the school as a new student, but she is personally requested by the King to help him settle in to daily life in Rosewood Academy.

The master of the school has an overwhelming power over the events that happen around the trapped. And that power is even greater on a certain day: her birthday.

One of the first Super Robot manga and the one that introduced most of the traits of the Mecha genre. Constructed with the Super-Alloy Z, Mazinger was built by Professor Juzo Kabuto as a weapon against the Mechanical Beasts of the evil Dr. Hell. Koji Kabuto, the grandson of Professor Kabuto, becomes the pilot of Mazinger Z when his grandfather is killed, and battles from there on against Dr. Hell and his allies. This is the first series that introduced the concept of a pilot inside a Mecha, which all series from then on have followed.