Short yuri manga, set in a near-futuristic mecha pilot training school.

From L.O.V.E.:

Through the activity of “Elfenbein” – an anti-government organization that Fon, Jacques and their other classmates established – Fon, now a 3rd year student in Ilegenes Military Academy, became a threat for those important people in the government with connections to the black market. Meanwhile, two female military cadets entered the academy – something unusual in the all-male environment of the academy. One of them, Gabrielle, is surrounded by mysterious movements of unrest… The long-awaited new series of Ilegenes finally begins!!

Kotori-chan and Hi-chan promised to marry each other when they grow up. But 10 years forward, the only one who’s actually “grown” is Kotori-chan, while Hi-chan still looks like a grade schooler. Hilarity ensues.

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.

Mihama Academy - on the surface, a closed learning environment established to nurture students who find themselves at odds with the world around them; in actuality, an orchard-cum-prison built to preserve fruit that has fallen too far from its tree.

Whatever the circumstances behind its establishment, Mihama Academy is at present home to five female students, all with their own reasons for "enrollment." For better or worse, each girl has established a routine obliging of her current situation; life moves at an idle, yet accommodating pace within the walls of Mihama.

Yet with the arrival of the institute's first male student, the nearly preposterously opaque Kazami Yuuji, the students at Mihama begin to fall out of step with their predetermined rhythms. Will Yuuji prove to be the element the girls around him needed to take hold of their lives once more, or will the weight of their pasts prove too steep a wall to overcome?

A young girl answers the door late at night and looks up to see a very, very tall man standing before her.

Chapters 1-2: Cocytus- A girl who cares very much about fitting in, and the girl she falls in love with, who wants to be honest about everything -- including their relationship. How will this work out...?

Chapters 3-5: Moratorium
Itsuki and Mao are aware of each other's feelings. However, both of them are waiting for the other to confess.

Asakura Kosame is rejected by the girl he likes. He bought a guitar and created a song solely for the confession on his graduation day in Junior High. Unfortunately, the girl likes another cool boy from another school, whom happens to be a member of a band.
Later, Kosame enters Meirou High. He decides to join a music club and become great to show it to the girl whom rejected him for revenge. But, it turns out there is NO music club at Meiro. The one who sees him at that time is...

After her mother's death, high schooler Mi-Hyang packs up her belongings and enters the household of her mother's formal manager. Even though she was a daughter of a rich man, with her father and other family members still alive and well, she apparently has good reasons for doing this... So the life of smiling 24/7 Mi-Hyang and the two good-looking sons of her mother's formal manager -- with their own set of unique personalities -- begins!!

From Canis Major Scanlations:

On a class trip to a museum, Kasama takes notice of his classmate Takagi, who he knows doesn’t talk to other people much. But as the latter enters a curiously shining door and realizes Takagi can see "it" as well, even his interest in the classmate is woken.

From MangaHelpers:
Maiharu Hiromi has moved from Nagasaki to Kamakura at the start of her high school years. Kamakura is a beautiful, mountainous place, with a view of the sea and Mt. Fuji, and Hiromi is thrilled to explore the area. Hiromi hasn't ridden a bike since she was very young, but she attempts to ride to her first day of school anyway. In her case, riding a bike does not come naturally, and she ends up bumping into her first friend, Tomoe, who helps her learn how to ride. It turns out Tomoe is going to be in Hiromi's class, and their teacher is also a cyclist. Now Hiromi's exciting high school life, full of new friends and learning about cycling is about to start.

From Blissful Sin:

1-2) In High School they had an indecent relationship. Now eight years later, at the school where Takebayashi is a teacher, that same Ono has come to be the school nurse. Smelling like an old man, sweet pick-up lines, totally aloof and bantering Ono. Takebayashi sighs. He gets angry, fights, and is surprised later... to find himself in Ono’s arms?

3) Ryouhei accidentally meets on the street with Naoyuki, his former neighbor friend who been nearly abandoned by its mother. It been some years since they seen each other, but how they will feel now?

4) Continuation Ryouhei x Naoyuki story

5) As it is: Tsuji is crying again because a broken heart when suddenly Aizawa, his best friend, kisses him. (Prequel to doujin Sono Mama de)

6) Has a short story Peach Sweet Home.

Shin, Kouji and Yuki are childhood friends and schoolmates. One day, all of a sudden, Kouji and Yuki confess to Shin and attack him. How will Shin respond?

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.

From Memory For You: Kunimi and Hideaki are childhood friends. But lately, Hideaki is behaving coldly towards Kunimi. Why?

From AOC Translations: A fast-paced heart pounding, and dangerous sonic love story!

Hina is busy managing the Apricot House in place of her father, but Anzu, the strange boy who lives in room 304 is quite the troublemaker.
One day, Hina accidentally breaks Anzu's keyboard and instead of asking Hina to pay for the damages, he asks her for favour after favour after favour! While this goes on, Hina discovers that Anzu is actually the charismatic vocalist for a super popular band!!! Is the lame weirdo that Hina knows the real Anzu? Or is the cool guy on stage? Hina's everyday life is changing rapidly.

From Paper Dolls Project:

Instead of her father, Hina is the one running the duties of the Building Manager in "Apricot House". One day, she accidentally destroys the keyboard of Apricot House room 304 strange resident. Hina is then asked by this strange guy to run errands for him as reimbursement. In truth, the strange guy residing in 304 is the charismatic vocals of the popular band ...... What will be his true face!? Chicks usually will change rapidly in the face of a cool stage -! Slowly, the world that Hina knows is changing. Experience this speed ​​of sound love story!

16-year-old Murai Masahiko is a fat, ugly, gaming-addicted social outcast with a fetish for the smell lingering around a scumbag in his class. When a beautiful girl named Mizusawa Haruka transfers into his class, one thing leads to another and they start dating. But there's a truth that Murai is all too aware of: Mizusawa Haruka died five years ago.

I Love You yori Aishiteru (I Love You More Than "I love you")
Honour student meets delinquent, and an unusual relationship begins.

End-of-volume extra: Onaka wo Sukasete Kaettekuru Ne (Come Home Hungry)
A crybaby who always gets picked onto sports teams because of her height but can't score to save her life, and her cool-headed childhood friend from the cookery club.

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?

A mysterious transfer student arrives to the third year, class C for Hanazono Girl's Middle School.
Akane is a plain and simple girl who was tired of her over bearing Friends, and silently thinks that it is o.k for the world to be destroyed. However, all the girls of the class wake up to find themselves in a desolated school, with count down timers. Every girl is tied to another one, and this pair must survive a 7 day Battle Royal. As it turns out, Akane is tied down to the mysterious transfer student.

Friendships crumbles, hopes are lost and sanity is tested as the game starts of with a bang!