Tsugawa Tatsuya just lost his parents in an accident... but he's trying not to let that keep him too down as he starts high school.

While trying to obey his father's final wish for him to become an upstanding man, he ends up helping a girl who was being bullied. Despite her exceedingly cold nature, he just can't leave her alone... which may not necessarily be to his benefit, as he ends up getting wrapped up in a world where things like parasitic mind-controlling bugs exist...

There's a reason why I help clean the school swimming pool. And the reason is a bit sentimental.

From Japanzai: Moe War is a comedic oneshot within which a popular girl tries to act “moe” to get out of repaying an otaku. As she soon realizes, however, she doesn’t understand moe at all.

From Anime Waves:
Rena Misaki was a normal girl in high school in the small town of Otogi. But lately she is being tormented by Kegari Chota (little hamster like imps that cause greatly increased sexual desire). They had been banished from the village long ago by a priest. But somehow they have returned and have taken an interest in Rena. And if that wasn't enough trouble, they are starting to spread. Rena has to find away to get rid of them and have a normal life, before she ends up sleeping with all the guys around her.

Yaegaki Meguru's next door neighbor is unique, to say the least. They are the Kusanagi ninja lineage, and their son, Kanata, has been her classmate and friend since their younger years. Kanata would always get into trouble or be late to class due to his ninja upbringings. Every morning, Meguru would have to pull him away from his training with his father. Most days, he's late to class anyway. In the past, they both vowed to never hide secrets from each other, yet Kanata would not reveal the "true purpose of a ninja." Meguru understood the reason behind Kanata's secrecy regarding his ninja background when a powerful force is released inside their own school. Then, Kanata will reveal his true potential as a ninja.

From Viz:
At first glance, Nina Sakura seems like a typical teenage girl. However, she's actually a transfer student from a witch school! Now enrolled in a Japanese middle school, Nina is hoping to improve her grades, make some friends, and practice love spells on her unsuspecting new classmates.

Shy Ayu Tateishi has just made a new friend at school. But this new friend, much to her surprise, is no ordinary classmate. Nina Sakura may look like a normal middle school girl, but she's got a big secret.
She's a witch.
Or, rather, she's studying to be a witch. And apparently, she's not doing her homework. Her spells are devastating in their ineffectiveness and often result in the most embarrassing situations for poor Ayu.
But things wouldn't be so bad if Nina's sorcery didn't make Ayu look silly in front of the one boy she secretly adores. All she wants is a simple love potion. What she gets, however, is a new best friend who almost flunked out of witch school!

From Viz:
All high school freshman Airi Hoshina ever wanted was to someday live in a cozy home with a loving husband, and find joy in the little things in life. As a result, she makes it her daily mission to get to school on time because school legend has it that the longer one's non-tardy streak is, the better boyfriend one will find. But just when her daily routine is working like clockwork, an occurrence of fairytale proportions threatens to disrupt her grand plan.

All Miki Koishikawa wanted was an ordinary family and that's exactly what she had until her parents decided to move in with another couple (as in switching spouses!) and turned Miki's world upside down. Now she lives in a house with four parents and her totally cute stepbrother, Yuu. It's bad enough being brought into her parents' strange soap opera, but Miki will star in a soap of her own as she deals with friends having affairs, trying to survive in school and ending up torn between her long-time crush, Ginta, and her new stepbrother!

Keitaro has had great difficulty getting into the university of his choice and no luck in meeting women. In a desperate effort to go into seclusion and study for his entrance exams, he volunteers to take over running his grandmother's hotel. His plans are ruined when he discovers that the "hotel" is actually an all-girls dormitory and some serious distractions ensue.

Note: Won the 25th Kodansha Manga Award for Best Shounen in 2001.

"Koganeiro" is about a group of high schoolers in their second year who are confronted with the possibly life-altering decision of what to do after high school.

Satou Hiroshi is the kind of polite, innocent, cute boy who's popular with guys and girls alike. But word-of-mouth has it that anyone who dates him will be plagued by a series of unfortunate events and near-death experiences - eventually being forced to institute a break-up 'under pain of death'...

Will bespectacled, 'uncool', baseball-crazy Tsumabuki Kasumi prove these rumours wrong or experience them first-hand? But after falling for Hiroshi's cute smile upon their (rather weird) first meeting, he's determined to tempt fate and find out whether he can finally break out of this unlucky streak and strike it lucky in his love life!

Bushido Academy gathers people who are descendants of the military commanders from the Warring States Period to fight for leadership. As Takeda Shingen's descendant, Takeda Tetsuro is forced to join Bushido Academy. Joining him is Sanada Rieko, who is descended from Sanada Masayuki, a loyal retainer of Takeda. Can they unify everyone together in a school where various warlord students battle for control? The curtain rises on this magnificent picture scroll featuring a Warring States themed academy.

Kanon Miura is a freshman in high school who belongs to the student council. Everything is peaceful until ping-pong club president Kaede Tamaki intrudes on the student council, which somehow results in all of the members joining the ping-pong club... Follow the adventures of give cute girls from both the student council and ping-pong club in this slice-of-life four-panel manga!

Friendship blossoming to love between a high school girl who tries extra hard to make up for her lack of height and a middle school boy who just looks too tall to be his real age.

This is a Thai comic.

Han Se In finds street fighter Moon Ji Soo on the street. When she tries to help him, he tells her to go away. Se In wants an apology but Ji Soo won't give one. She then slaps him and runs. Moon Ji Soo wants revenge...

Mayama Haruki and Himemiya Tsukiko have been childhood friends and neighbors for as long as they can remember, but after a girls-only meeting in fourth grade, Himemiya distanced herself from Mayama. Now in their 2nd year of middle school, Mayama has become an ero-freak who specializes in harassing Himemiya. Determined to unravel the greatest secret of girls, what happens on "that day", Mayama follows Himemiya and uncovers.

Comical sidestories from within the main series' timeline and featuring some new characters.

Collected in Volume 28 of the main series.

The hilarious misadventures of the "Sket Dan"; a couple of high schoolers who help out people as part of their club activity: Himeko, the hot-headed ex-delinquent with a soft spot for cute things and a taste for strange food; Switch, the brainy otaku who only talks via a computerized speech-application; and Bossun, the atypical leader of this looney bunch, with the amazing power to... concentrate very hard!

Sket Dance won the 55th annual Shogakukan Manga Award in 2009 for best shounen manga.

From MoonFlower Scans:

Mustuki Yoneya, a high schooler, feels insecure and jealous because her constant companion and best friend, Nishio Kyuteki is starting to pay attention to a beautiful upperclassman. Seeing the senpai's attractiveness as a threat to her wish to remain at her best friend's side forever, she tries out several attempts as she strives to become the main object of Kyuteki's attention.

Note: Original language image is not available.