Science fiction manga series about the discovery of a gateway in time and space deep underwater which allows for travel between the present day and the age of the dinosaurs.

All of a sudden, out of nowhere.
“Renya Kunugi, you have passed away!”
So said the young girl who styled herself God.
Apparently, Renya Kunugi the Protagonist had lived long and prospered. His life already came to a peaceful and fulfilling end, but at the request of Her Holiness, he was transported to an alternate world to start a new life as a young man.
Thus did Renya, who was definitely your average everyday guy, end up fighting off bandits and vanquishing monsters. Eventually, after his successively blossoming talents coalesce into a force of sheer awesomeness, he will go on to leave his mark upon this alternate world.

A pervert with great martial arts skills, a klutz of a nun, a dojo master with a bombastic imagination, a volatile code of chivalry, a mentally unstable patient who flippantly gives out internal energy… and so many experts who’re castrated? Hehe—So this is murim?!

Yamada Masami leads a double life. During the day, she's an ordinary student in Tokyo with glasses and pigtail braids. At night, she dresses herself up and becomes the glamorous call girl Miyabi. She doesn't just do it for the money; she loves the pleasure and happiness she can bring to her customers.
It seems like this double life can't last forever, though. Her chubby friend Aki, who spends her time desperately dieting in order to attract a man, doesn't understand why Masami is so opposed to getting a boyfriend. Her other classmates, the perverted Kaneko and the rich Sasaki Kaori, have opposing views of the acceptability of the pleasure industries. What will happen if the people who know Masami during the day discover the secret existence of the lovely Miyabi?

From Evil Flowers:

Fukka, the daughter of the Inuiyama's lord, is determinate to do everything to help her father win the war and get him home safely. Because she's a girl she's not allowed to go to the battle field with him, but she hears that a certain "war ghost" called Byakkimaru has been seen near her town. The legend says that if you get Byakkimaru to join your side you will win the war. The little princess starts a trip in search of this ghost determined to save her clan.

Urashima Eiji, a college student, goes to sleep after a fun drinking night with his friends. When he wakes up he discovers a beautiful girl next to him who treats him as if they are in a loving relationship. Later, Eiji finds out that 3 days have passed since he went out with his crew. What did he do during all that time and why does he have no memory of it? By confronting that reality, he will be caught in tragedy...

After various things happened, I got an ability from God and reincarnated to another world! While being watched over by my high-spec family, the super ordinary me fully enjoyed other world life. Using the ability I received from God, I had a daily life of just fluffing and petting fantasy animals. There are some shady movements too, but while being led by the nose by God, I’ll do my best at various things with my cheat-like comrades!

Lazy as a sloth, with a cuss flowing vulgarities, playful,carefree being, little Imp Wei Xiao Bao survived through dangers , he doesn't know martial arts let turn the Jiang hu and imperial court into his palm. As state , every step is filled with danger, every stage is hugging beauties.

Rambunctious high school student Hayate is the lone girl in an all-boys soccer club. One day, honors student Yuuto suddenly asks her out, starting a cute opposites-attract romance.

Chiaki is an artificial girl manufactured in a laboratory. When she is taken out of the laboratory by Yoshiaki, who loves fighting, drinking and money, she decides to make Yoshiaki fall in love with her.

Will she be able to get the attention of Yoshiaki, who doesn't see her as a love interest at all--?

From Ikemen Manga:

A fun romantic comedy revolving around Wada Erina, a high school girl who absolutely adores cats, and her classmate, Nekoyama Akira, who is unsociable and always wears a mask. Erina is usually nicknamed "Queen" by her classmates due to her cool appearance but when she talks about cats, she gets extremely excited.

One day, a cat visits her yard. Lured by it’s cuteness, she gets excited and kisses the cat, and then...?!

While pursuing a criminal, the pretty but reckless interplanetary police officer Birdy Cephon Altera accidentally kills Tsutomu, an Earthling high school student. To make amends, Birdy is forced to share her own body with Tsutomu's spirit so that he can continue his own life.

At first, Tsutomu knows nothing about his situation, but he soon discovers that his body is starting to take certain actions without his mind ordering it. In times of action, Birdy takes full control of their shared body, transforming it back into her original female form.

NOTE: Volume 1 came out 7/1996 and was never finished. A second series was published under the manga title ＶＳ版　鉄腕バーディー for 2 volumes. This second series came out 12/1996.

A crazy manga about Minako, a young and beautiful woman living alone with her cat, Moeko. And ahegao. There's also ahegao.

Even though he’s such a good-for-nothing…
Why is my heart racing like this!?

Hazuki Umi is a caring middle school student, beloved by everyone who lives on the island.
In contrast, Inoue Fuuta has done nothing but be lazy at home ever since he moved to the island to open up a guesthouse.
An overwhelming age difference of 15 years lies between them.
He has no delicacy, he isn’t reliable at all…
And yet, his words always manage to make her heart race, her face flush---

The age-gap romance between a pure middle school girl and a boring 30-year old man begins now!

A twitter short by @hamita1220

"Let me look at all of you," he says while peering into my eyes. Every single one of his thrusts makes me ache deep inside both my body and heart. I didn't know I was still capable of feeling this way...

A slave to her work, Marika Kudou only finds out about her broken engagement with her fiancé over a single text message. The saddest thing about it is that she doesn't feel anything at all when greeted with the news. That same night, she meets a kind man at the bar whose gentle words are so comforting that they end up making love in order to soothe her loneliness. However, the sex was too intensely passionate to be merely called comfort sex. Just as she decides to lock the memories of that night away, it turns out that the new president at her company is the same man she was in bed with until that very morning!

The various, daily life of the female student who hates love, Han Yeonsil. A romcom you can relate to!

Three days dragon flight from the nearest town, deep, deep in the forest, then deeper still, lives a 'witch'. Nina the witch, also called "The world's strongest witch". Visiting her is the apprentice, Iris.
This is the record of the witch and her apprentice's peaceful days, in a remote forest that breathes illusions and magic.

Sayaka, a kindergarten teacher, has to start doing adult work to cover the moving expenses after her boyfriend left her. However, her very first customer as a call girl is none other than the parent of one of her student...?! Andou-san raises his son on his own and takes him to school every day. Such a kind man, he tells Sayaka take her pay and go home without doing anything. Sayaka refuses, and now Andou-san is going to 'touch her until the time is up'.

Eitoku Academy has a legacy of being a school for the ultimate elite, the best of the best. And the most rich and powerful students there have formed the Correct 5 clique to maintain the integrity of their school. Unfortunately, new student Oto Edogawa doesn’t have the pedigreed background of her peers and has to work part-time jobs to help make ends meet. Will a chance encounter with Haruto Kaguragi, the leader of the Correct 5, put everything at risk?