Welcome to the prison-like city of Kowloon. A cluster of conjoined buildings run by gangs. Where the ability of an individual to hope is non-existent. Daniel, Jin, and Ariana are three kids who defy this life sentence. They intend to escape and are willing to go to extreme measures to do so. Since escape on foot is impossible, their quest leads them to the sky.

A girl who grew up in the Amazon was entrusted by her grandfather to an arrogant Young Master. Unfamiliar with the life in the city, she reacted in many silly ways and gradually captivated the Young Master?!

A girl falls for a boy who is a talented pianist who wants to quit, however...

From Tokyopop:
CLAMP School Detectives focuses on the exploits of Akira, Nokoru, and Suoh - 3 pre-teen sleuths - and their quest to make the CLAMP world safe for the girls in their class...

A short gag "series" that Clamp draws in various magazines. Each involves xxxHOLiC and another CLAMP title.

From Tokyopop: To honor CLAMP's 15th anniversary, CLAMP no Kiseki: The Ultimate Collection features full-color pages, exclusive material, 6 pages of new, never-before-seen manga, and limited-edition collectible figures!

Clannad is set in a high-school located in a Japanese town. Tomoya Okazaki is a third-year student who doesn't take his studies seriously. Always late for class, he's seen as a delinquent by the rest of his classmates who are busy preparing for their entrance examinations. Needless to say, he doesn't have too many close friends either.

Tomoya seems not to mind too--until he meets a few other girls from his school. Though he doesn't care much about them at first, he soon opens his heart to them as they get to know each other better.

Clannad is a romantic youth drama that's likely to be more down-to-earth than Key's other works. But like Kanon and Air, Clannad's story is expected to be another touching and heart-breaking weeper.

Based off the game of the same name.

A series of 4-koma comics drawn by various mangaka involving characters from the KEY visual novel Clannad. There are no game (or anime) spoilers in this book.

• Clash
A prince at school and at home, Yama is the perfect student. Only when he is alone can he show his true self and his true personality. But, one day, a girl named Saku follows him to his villa and somehow she finds out about his true personality. What will happen now!?

• Extra: Kimi to Iru Kyoushitsu
"When we are together, my heart always tries to tell you; I like you the most...but I am unable to say that aloud, unable to tell because we are just 'good friends'."

N/A

Will a boy without any motivation be able to save the world?

When you call for domestic help, it's your classmate who comes...?! A daily short series of romantic comedy with a maid classmate!

Chao, a wheelchair-bound little boy, is excited to be finally going to school to make friends with people his own age! But when he gets to his homeroom, the weirdness begins. Reality is warped and the children slowly realize that their teacher is a monster in disguise. This monster teacher is capable of inflicting a horrible punishment on students that are unable to answer his question about punctuation. Will any of the students be able to discover the answer before it is too late?

I, Takayama Aruto was summoned again in replay mode, keeping all of my past stats. This time, a large Hero’s Summoning was conducted which brought along the whole class. Sick of doing the job of a Hero, I hid my stats from the others and chose to become a merchant. But, I must have hidden my stats so well that our summoner thought I was trash and was casted aside. So, I decided to form a party with the three beauties in my class who were similarly thought to be useless (a Tsundere, a lolita and a meek girl)! But, it’s okay. I still have my Item Box and Item Shop. I’ll just have to make whatever it is I need! And so, I led a relaxed life in another world creating items DIY and hawking, but…… The Dragon Demon Lord and my past wife, a succubus comes knocking on my doorstep and seeking love. It seems that the transmigration this time is going to be troublesome yet again!

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TL;DR Version: OP Harem Isekai Protag gets Isekai'd again (with his entire class this time), hides double OP abilities for slow-life living, starts new harem with girls from the class and the harem from the first otherworld that followed him to this one.

After being accepted by the Melite Conservatory of Music, Taki Ren, travels all the way to the City of Music, Vienna, to fulfill her dream of becoming a composer. However, there's one problem: Melite is an all-boy's school! Her classmates are all musical geniuses, but they also come with problems!

A collection of mildly ecchi otokonoko-styled stories focusing on crossdressing high-school boys and the boys who like them, mostly from the men's magazine Oto Nyan. Some of the stories are continued in Hiriajuu Shuudan ga Classmate o Josousasete Kanojo ni Shite Mita.

1-3. Raising Decoy
A boy helps his classmate go undercover in drag to catch subway gropers, and finds that he looks disturbingly good in a dress....

4. Ato no Matsuri (retitled Spilled Milk in the English edition)
A group of male students, having failed to get girlfriends, are becoming desperate; what will these "innocent" boys resort to?

5. Tenshi no Houbutsusen (Parabola)
Baseball-themed romance short.

6. Actress
A boy joins his high school's film club to meet the actress from their amateur film, but gets a surprise...

7. Shishiza no Boku to Natsu no Yozora (retitled Leo and the Night Sky of Summer in the English edition)
The president of the school astronomy club wants to catch UFOs.. maybe some "sexy female alien" costumes will help?

By chance, Fang Tang came across Ah Shu, someone he noticed long ago. The two became classmates and intimate friends. A pure love school life manhua with a refreshing art style.

From Kirei Cake:

It's been declared that Nishi High will close in two years. Since then, the student population has dropped to a mere seven. Hazakura Motoya, one of the remaining students, decides to stay for the free ride through high school.

Suddenly, everyone is shocked when they receive three new transfer students, Kayama, Mizumura, and Toujou, girls who are actually members of a special military division.

Soon after, Motoya and the three girls witness a giant tower suddenly appearing on the school grounds. Motoya is destined to enter with the girls in order to uncover the mysteries of this tower.

Shirasaki is incredibly bored by his unchanging daily school life and he ends up falling for his weird classmate Kamimura Yuuka, who rants about changing the world to his uninterested classmates. However, when she reveals the truth about the nature of their world to him, everything will quickly become stranger than he would ever have expected!