From BangAQUA:

A marvelous actor who has stage fright plays various roles in real life!
The agency Catherine is the company which sends so-called extras in real life.
Yaegashi Taiga, a marvelous actor that has stage fright, tries his best to fulfill the requests he is given by this company. One day, he is told to work on a request with the newbie Amae Shizuku...
But Shizuku has a secret and...?! Please come to our office if anything troubles you!
The excellent extras will support you throughout your daily life.

1-3,6) Summer-Colored Boys
A new school year is often synonymous with new class and getting to know your peers. It is an opportunity to meet new people & making new friends. And sometimes it doesn't take much to bring two people together, who at first seems to have nothing in common, just like Tomoyuki and Aoi. Nothing seems to predestinate them to be more than just classmates, and yet the simple fact of sharing the same surname seems to make Aoi consider Tomoyuki his future best friend. Even though Tomoyuki is reluctant at first, he is gradually tamed by this exuberant boy. Until the day he realizes a new overwhelming feeling, but it's already too late to go back...

4) Honey
Even though Yuuki is the one who confessed Tooru still feels insecure in their relationship.

5) My Love Life
Soccer player Shintarou comes across Haruka and mistakes his Senpai for a girl. Shintarou's not will to give up just because Haruka-Senpai turn's out to be a boy though. Shintarou's a great man who's hearts bigger than the universe. He'll even love Haruka-Senpai's male parts!

When it comes to cooking, Haruka cannot do anything right. She develops a crush on Kurogane-kun who appears to be a nice, shy boy. As Haruka strives to get closer to Kurogane-kun she discovers that not only is he secretly a devil, but he is also known as the household prince!

Sounji Nagare was in despair at his own incompetence and the contrasting, sheer brilliance of his younger brother.
But his destiny takes an unexpected turn when he meets a beautiful young girl who calls herself a "god".

Where will his family's secret dark occupation and Nagare's bloody past take him?

Ariyuki is standing in front of his former home which happens to be destroyed by a meteorite. Among the ruins he finds a gem which frees a young girl. The girl claims to be a god and is willing to grant him his dearest wishes.

To celebrate the 25th anniversary of Big Comic Spirits, Takahashi Rumiko released this short detailing where she got inspiration for her popular Spirits serial "Maison Ikkoku".

From Perfect Illusions:

This is the story of Hamada Akari, a sixteen-year-old girl whose father has problems with money. To pay off one of his debts, her dad sends her as a servant to the Otomo family. She is forced to live with them and attend a private school where only the richest and snobbiest kids enroll. The son of the Otomo family fights constantly with her and the tension between the two never seems to disappear.

Akiko Chirubi (明子 智流美) is a boy who studies at highschool in Tokyo. When he turns to 17, his life suddenly changes. He starts to hear strange parasyte voice on his mind and gets confused and mad. Moreover a digital virus occupies smarts phones world wide and very strange situations occur everyday. His best friend Tsukide Akari (月出 光 ) tries to calm down and help Chirubi but she has a secret. There is one thing clear. The world is changing strangely. Is going to Chirubi get rid off the sounds on his mind? What is the secret of Akari? What is going to be to the world after all?

A series of doujinshi featuring self-parodies of Psyche Delico’s works: Chocolate, Strawberry, Vanilla; Junai Ero Ki; Nokorimono ni wa Ai go?!; Kizudarake no Airabuyuu; Eroman - Kami to Pen to Sex to!!; and Renai Switch. Ch5: This is an alternate ending to the second chapter from "Choco Strawberry Vanilla". Ch6: This story takes place after the end of "Choco Strawberry Vanilla" volume.

A tropical trio of lovely ladies undergoes survival training in the south! Three second-year high-school students from a military academy – tomboy Kasumi Minami, ditzy airhead Raika Utsuri, and dependable Subaru Toma – are stationed for survival training in Nonamimi, an uninhabited island in the southern seas. The girls find out that their wild tropical army life is fraught with all sorts of problems from day one! Will they be able to carry out their mission, and graduate in one piece?!

from fictiondb:
IN A CABIN IN THE WOODS .

To fun-loving Sherry White, a summer camp for intellectually gifted children seemed the perfect getaway from the smothering influence of her wacky but well-intentioned stepmother. But she soon realized that sharing a cabin with seven precocious little girls and a contraband hamster, under the watchful eye of Camp Gitche Gumee's gorgeous, disapproving director, Jeff Roarke, was more than child's play.

Roarke's businesslike attitude and crack-of-dawn staff meetings were anything but relaxing. Still, a midnight lakeside rendezvous had Sherry atingle in a way she was certain ran counter to Roarke's strict antiromance policy. Dare she risk falling under the spell of this unwilling prince?

Inazuma and Ikazuchi, the Akatsuki-class Destroyer Kanmusume fighting with the Abyssals as their duty in the Naval School, had a secret they couldn't tell to other Kanmusume"When we fight, we want to win, but we want to save their lives...is that weird?"The kindhearted Kanmusume will do their best at their duty today as well.

The earth is ruled by the Black Witch.
The Black Witch was sealed in the moon and can only be judged once a decade on the night of Hexennacht.
The ones who can fight the Black Witch are the chosen magical girls who have won their battles.
Horinouchi Mitsuru, the Eastern Japan representative who aims to be the strongest, happens across a girl with strange power who says her name is Kagami Kagami.

The girls "clash"!
To save the world with their own power!!

Love in middle school is a simple, straightforward and exciting thing. Love in high school is a bittersweet thing that makes one anxious and timid. This love is a secret.
Two childhood friends and neighbours suddenly stopped talking to each other after summer break. What could have happened between these best friends who used to be joined at the hip?

With no memories, except for a sense of overwhelming coldness, she awakens in a bed to two strange men keeping care of her, but unable to understand her.

Collona Merri is a remote country whereby experiencing a strange phenomena that seldom occur in other countries, ''The Light Sparks''. Due to the phenomena, one group of its citizens obtains a mysterious power that is unknown. However, the country was in peace and harmony for 89 years until the strike of an unexpected war. Leighton, which was only 12 years old at that time was selling fruits in the market with his sister, Sarah to support their family. He had to stay strong to overcome all the sadness that were brought by the war. Will they able to adapt to the situation around them? Will Collona Merri be in peace again?

Volumes of steamy yuri one-shots. Volume 1: • Suki Dokidoki Kiss. • Ichiban Sukina Hito • Arcadia ~Flowers of Paradise~ • Girls' Union • From Your L-I-P-S • Hao! • The Greenhouse Witch • Sweet Little Devil (NANZAKI Iku) • Blue (HAYASE Hashiba) Contains a Yuri Hime Art Collection Volume 2: • Onshitsu no Himitsu (Greenhouse Secret) • Girls Study • Tojitete ne, Kokoro (Keep Your Heart Closed) • Yurete Hazunde • Heart And Soul • Love and SeX • Teacher's Pet • Neko ni Naritai Volume 3: • Sweet • Netemo Sametemo • Closet Daisakusen (The Great Closet Operation) • Sweet Sweet Honey • Love Prep Room • Sweet Exercise • Otona to Kodomo to • Time • Shoujo no Hyouhonshitsu

A teacher is looking for a school by the name of Seishou Academy, as he is a new transfer teacher for that school. Seishou Academy is known for having students with excellent marksmanship. However, he gets lost along the way and decides to look for someone who knows where the school is at a summer festival. He encounters a girl at a shooting range and finds her marksmanship skills to be professional. The girl tells the new teacher that she is an assault rifle, not a student. Her name is FNC and is an assault rifle of Seishou Academy. The new teacher attends school the next day to find students, including FNC, practicing shooting M16s and realizes that he has come to an unbelievable school. How will his experience be at Seishou Academy?

Note: Chapter 9 technically doesn't exist, it was skipped when "Upotte! Nano" switched publications from Young Ace to Shōnen Ace.

Sudo Nagiko aquires a Boyfriend unwillingly. The Boy named Tobita decided to be her Boyfriend after calling her Ugly. He does not seem the type to take no for an Answer, especially after showing Yandere tendencies.

From Bamboo Feathers:

When he was a child, Isao was inspired by a florist named Aiko and fell in love with flowers. After saving his father's company, Isao finally leaves his desk job to realize his lifelong dream of owning a flower shop, opening it in the same location that Aiko's shop used to be.

Right before opening, he finds out that Aiko had passed away when he meets her widower Koutarou and their young son. Koutarou is utterly devoted to his son Zen and carries on the love of flowers that Aiko instilled in him. Thus the new florist Isao falls in love with Koutarou, and tries to win his heart through the flowers they both love.