From Dan of Population GO:

Ogi Juugo has forsaken the entertainment industry ever since it caused the death of his family. However, fate had different plans. After proposing to his girlfriend and being shot down, he realizes that his girlfriend is actually a model. Acting on his love for her he decides that it is time to return to the industry.

The illusion of that person leads me astray. Mother and son. This is the ultimate favoritism.

Nakahara Yusuke is a high school boy who has a very loving younger sister, Maria. She loves spending each day taking care of him, doing things such as cooking and cleaning around the house. However, she typically goes a bit too far into treating him like a child--she has a habit of coming to his classroom at lunch to hand-feed him his bento, or brushing his teeth for him at home. She even snoops out his hidden porn magazines. Other people think they're a bit weird, and that Maria acts like his lover or his mom. This 4-koma features their unusual daily life!

High school girl Akari was lost in a forest when when was rescued by a vampire girl named Sophie. Since then, Akari has developed a liking for Sophie, who prefers to be alone.

From etc:
Bookish and naive, Angelo da Canossa is unprepared for life as a student in a university that hums with tension and intrigue in Renaissance Italy. Will his innocence remain intact when a chance encounter with the charismatic Cesare draws him ever deeper into the darker side of the Renaissance?

Note: In creating Cesare, Souryo has collaborated with a Dante scholar to bring to life a vivid portrait of Renaissance Italy in great and accurate detail.

Six months after the fight to the death with The Bog, Kaiji escapes from the underground and pays off his debts. Sakazaki gets fed up with Kaiji and tries to get rid of him by giving him 3 million yen as compensation. At that time, Kaiji is reunited with Miyoshi and Maeda, who were his friends in the underground, and they come up with a plan to swindle a large sum of money from Muraoka, the president of the underground casino where they work. Kaiji takes 3 million yen from Sakazaki, promising to pay it back, and plays a variant of mahjong called "17 Steps" invented by Muraoka.

Take me to the end of the world... said Blaise Cendrars.
Come on, I'll take you, says Keiichi Koike.
He takes you on a trip through time and space to the end of the world that is also but the beginning of it all...

Tenka is a chad virgin sigma male who will use his di-- I mean his holy sword to defeat all the succubi because nonconsensual sex is wrong, kids. He teams up with the Holy Maiden Amelia (with an A) who also uses less-than-traditional weapons.

21-year-old Jang AnCheol has been on fast-track to success when he is cursed by a classmate he had bullied 3 years ago in high school. Now placed in loser’s body he had bullied 3 years ago, he is tasked with stopping 4 “Life Completely Ruined” incidents as well as rehabilitating his past self in order to undo the curse. How will he navigate his way through his past self and his cronies torments?

From the author of "Lookism" and artist of "Free Draw".

A tribute anthology for Mushishi.

The protagonist is a mysterious and resourceful man who goes by the name "Zero." An expert on artworks, antiques and ancient artefacts, Zero is adept at rooting out their histories and uncovering any unusual qualities they possess. Because of this, he frequently gets called on to dispel "curses" and to both uncover and create forgeries.

Zero is a man who will stop at nothing to see a job done, but he will also charge whatever fee he deems appropriate: it might be a billion dollars, or it might just be one.

A veteran adventurer was preparing for his retirement when his former disciple returned to the village, intending to recruit the old man to his party. Filled with regret due to an incident that happened in his first party, the old man rejected his offer. Being affected by his disciple’s adventurous spirit, the old man leaves in hopes of reigniting his long-lost dream, to become the strongest adventurer that ever lived.

A story about two students who share a bad case of insomnia, who find napping refuge in their school’s abandoned observatory.

In a city overflowing with heinous crimes and violence, two girls make it their job to kill criminals who can not be dealt with by police.

Ruu Brandel, a genius wizard with a talent for thousands of years. One day helped a beautiful aristocratic daughter, Franc and was to be assigned to “Magic Girls' Gakuen” where he acts as a teacher! Now, the “non-standard” teacher life by the strongest wizard opens!

(Source: MangaUpdates)

"Ecchi stuff that also may have a story...."

Six old friends in their thirties meet at a gathering of former high school mates. Today, everyone has a stable life, but they feel dissatisfied. Because they left behind their childhood dreams, those they would like to find back...

Rose is a hitman allowed residency in exchange for her services, but she is careful to keep it secret from the light of her life, her girlfriend. Benika wishes for a relationship where they can see each other more often, but she must also keep it secret from her wholly devout parent. Father Shirogane is concerned his daughter cannot tell him who she is dating, but he also struggles with the hitman who keeps returning to confess her crimes. Amid all the secrecy, a new conspiracy surrounds the three of them, granting Rose an unexpected chance to leave the hitman life for good. But at what cost?

On that day, suddenly, every single male virgin over the age of 18 started dying rapidly, causing a huge panic across Japan! Sex industry prices skyrocket overnight, forming angry mobs of terrified virgins, and the government knows not how to handle such an unprecedented crisis.

Enter our protagonist, 17-year old virgin Kurumi Eiri. He has to get laid before his 18th birthday, or he'll die! He hurriedly confesses to girls, only to be shot down without any hope. Is there any way for him to graduate from virginity?! What will the virgins do when death is staring them in the face?!