Shinohana Mayu and Aoba Souma are childhood friends and enrolled in the same high school. There's energetic Mayu surrounded by her classmates with their unique personalities and Souma who always looks out for her. Join in their daily lives in this hybrid childhood friend-school life comedy!
(Source: MAL)

A beautiful older lady regularly visits a coffee-shop where the high school student Hayasegawa-kun works at. He doesn't know her name, her job, or where she lives, but she is nevertheless his "ideal woman".

1-4) Hungry Monster
Kabutani is a “man-eater” who lives off human energy. One day, he becomes “in-heat” for his classmate, Kiriyama. Though he didn’t believe when his kindred said, “…Nothing compares to the taste of the ‘human’ you love!”, he couldn’t resist a “taste” of Kiriyama… And once he had, he became addicted to that tantalizing taste only Kiriyama can provide. What would a hungry and ruthless Kabutani do to curb his craving…!?

5-6) Love & Kiss!
University student and track and field club member, Haruta Mimatsumori, has had a crush on the track star, Yuichi Adachi, who has since retired due to injury. Now, Adachi-san is coaching Haruta's track club! What an opportunity! Too bad Haruta is rather shy...

Extra) Selfish Monster
More of Kabutani and Kiriyama.

Waking up as the descentand of a Nobel family of traditional Chinese medicine, Han Fei found herself unable to bend down and see her toes.
Later, she found out that she is known as the famous fat woman of the prime minister Han's house, the eldest daughter of the Han family.
And King Qin, who was laughed at and crippled, was her husband to be appointed.
She finds the person born for being a perfect match for her, For the face similar to a celebrity, Han Fei decided that she wants to lose weight, and She's going to have the best wedding!

From Fantasyshrine:

Volume 1:
Reiji has never forgotten Kagami, the man who cruelly dumped him 10 years ago. Now, they unexpectedly meet again! Will Reiji finally be able to let go of his unrequited love, or will his love for Kagami once again only lead him to heartbreak?

Volume 2:
Luciano met the president of a cosmetic company, Munakata, during a party and was offered to become the exclusive model for their new male product line on the spot! However, was there a string attached to Munakata’s generous offer to Luciano? Or did he simply want to get up close and personal with his new model—!?

Yamada, a kind-hearted and well endowed high school girl, comes across Takahashi, a high school teacher, who was taking a nap near the forest as he's got a lot on his mind. Lost in their own little world, Yamada helps unravel Takahashi's troubles with her soothing kindness...

From Summer Rain and Senpai Scans:

Sonokawa Tsubasa - 15 years old.
A bubbly, energetic girl who's called 'stalker' by a lot of her classmates because she chases after the guy she wants relentlessly. After getting rejected by an upperclassman who saved her at the train station, she decides to help her childhood friend, Yuri, with her job as the basketball club's manager. There, she meets quiet, unobtrusive Akkey...

Aoyoma Tsukiko has always been misunderstood due to her expressionless face. Having to repeat first year of high school again due to her usual bad luck, she strives to have a happy and cheerful high school life. Then meets her classmate who is a deliberate loner. However, due to her nature, she aims to befriend him, much to his annoyance. Can a friendship grow between a poker face, cheerful girl and the loner? Can she break through his walls?

Am I reborn? in my previous life I was a designer who had just graduated, then one day had an accident. Adelaide, that's what's new in this new life, my life feels very boring, but suddenly there is news that there is a girl across dimensions, and decided to go to the capital. Is there something waiting in the capital?

From Tokyopop: Daughter of a brilliant professor, Asuna is a below-average student at Ecole du Ciel, where teachers and other students constantly belittle her. However, with the world spiraling toward war, Asuna's headed for a crash course in danger and love, as everyone prepares for combat...

Batman would marry two face in this universe.

Shibazeki Suiren is a stunningly beautiful girl. When she enters high school, most of her classmates are astonished by her beauty, but after noticing her quiet manners and lack of contact with anyone else except her friends Yuri and Aya, she receives the nickname "Takane no Hana", a beautiful flower but impossible to reach. However, after a fellow freshman called Kawasumi Kouha saves her from a persistent suitor, she finds herself mesmerized by him... as he's the only boy who won't look at her no matter what.

In a modern-day loli's home, a super handsome ancient Jinyiwei falls from the sky! Without parental care, the loli takes him as her closest person and even wants to become his bride?! Though he appears tsundere, cold, and picky on the surface, he finds it harder and harder to let go of her...

Note: Jinyiwei (in English "embroidered military guard") were secret police in China during the Ming dynasty (see Wikipedia for more).

Chapter 1-4 ; Wagamama mo Kimi no Tame Nara Ikura Demo
Playboy omega Mahiro wants to live his life to the fullest before the onset of his first heat. When Mahiro discovers that the shy, awkward alpha Yoneya likes him, he decides to fool around with him. But little by little he begins to think Yoneya's personality is attractive. However, Yoneya is the son of an elite alpha family, different from the world which Mahiro inhabits.

Chapter 5-6 ; Itetsuku Kosen
A story of friends/acquaintance of Mahiro & Yoneya

The story centers around Yuna and Akari who have two very different views of love: Yuna is someone who sees love as a dream and Akari is someone who is very realistic about her romance choices. Meanwhile, there are two boys, Kazuomi and Rio, who also have different views of love: Kazuomi’s an airhead and doesn't understand the concept of love while Rio grabs the opportunity when confessed to as long as the girl looks cute.

http://betsuma.shueisha.co.jp/furifura/

From Hoshikuzuu Scans:

Maki, a popular and good-looking dude, but a virgin. Despite his playboy looks, he believes that sex should be done with someone you like. A pure-hearted teenage boy that you rarely see nowadays. And by some accident, his classmate Miyashita found out about him being a virgin. In exchange for his silence, Maki is threatened into going out with him. He reluctantly accepts, but later discovers that Miyashita is a huge sadist.

This adventure started with a young alchemist, who tried to rescue a princess, but this princess turned out to be a dragon. What will result in this strange, but funny meeting?

Hiroki was going to be an artist after high school, but has stopped drawing for an unknown reason. He became a teacher at Nadesico Academy, where his cousin, Elis, attends. Then, his childhood friend, Kiri, became a PE teacher at Nadesico who seems to be part of the reason why he stopped drawing....

The manga tells the strange tale of cigarettes in robotic human female form who expel tobacco from their kisses, much like regular cigarettes would.
The male main character, who has never kissed anyone before, slowly adjusts his life around his new cigarette girl and newfound "addiction".

Ruka, who never had a boyfriend in 17 years due to her shyness, keeps dreaming of a silver knight calling her name. One day, she hears a rumor about a stone that can make its owner have sweet dreams while sleeping. Followed by a strange event, Ruka tries the stone and is brought into the dream. However, what she finds in that dream isn't something that she had expected. She wakes up neither in her bed nor in her own world, but in a world where Valkyries rule.