Our unlucky protagonist, Jin, uses the trunk of a sacred tree to carve a statue for a school project. When he takes it outside, to his surprise it begins absorbing the surrounding earth and transforms into...a girl! So naturally this guardian deity is pretty pissed that her tree was cut down, and lives with Jin while she takes out her anger by squashing bugs...er, cleaning the "Impurities".

Kurono Crawford (Chrono Crawford), a noble of Cepheus Empire had a secret. It was that he came from a Different world… Modern Japan. Having the knowledge about the modern weapons and his sense of values, he was an existence almost like a cheat, aiming to be the “Harem king”.

Abandoned by his superiors, left in command of the Empire’s rejects consisting of demi-humans such as Minotaurs, Dwarfs, and Elves, and thrust into a position as head of a poor fiefdom, Chrono will do everything he can to rebuild and strengthen his forces and revitalize the land, aided in part by his knowledge of the other world.

Description from MU:
Weird development where the main character, who is the fourth son of a noble household and is called the stain of nobility, has to inherit the house because his three brothers were conveniently in the same party and all died to a meteorite apparently. The older sister who's left disowns herself and instead registers herself as his foster daughter and now she calls him dad all to get the him to head the house and have him demonstrate his true ability.

The current generation of humans are often said to be called descendants of Adam and Eve. However, there lies a small number of a different type of humans in this world. Children of the one who is called to be Adam's first Eve - Lilith. Her children look completely the same as Eve's descendants, and the few who live among us... are still somewhere in the world.

Welcome to the first other world exchange program. An encounter and everyday life with people from other world in a 4.5 tatami mat room.

Chigachi Fuuta an ordinary high school student who really admires ninjas is gifted with an extraordinary legacy, namely the soul of Hattori Hanzo, a legendary ninja. But because of that legacy, Chigachi Fuuta is targeted by various shinobi and ninja who still survive in the modern era. Can Chigachi Fuuta overcome these obstacles?

Ostracized and attacked by his home village after the death of his mother, the half-human half-demon Elliot establishes himself as a dungeon lord with the help of his father's succubus.

Shiina Aki is constantly being treated like a girl due to his feminine looks so he decides to move to Tokyo to attend middle school in an attempt to change himself.

However what awaits him in his new home, Sunohara-sou, is the kind-hearted caretaker, Sunohara Ayaka. Along with the three female members of Aki's new middle school's student council, Yukimoto Yuzu, Yamanashi Sumire & Kazami Yuri.

And so begins Aki's new life in Tokyo living with 4 girls.

Lived for the sword, died for the sword.

There’s no regret in in his lifetime一一 only one thing, but only admiration remained.

One day Souma recovers his memory from the previous life, but also on the same day he was brand as incompetent person.

Denied by what he long for …. However for Souma , it has nothing to do with him.

一一I want to use magic.

Ancient ruins, underground labyrinths, demon’s territory, forest of witch.

If you hear something about magic, you head there without hesitation, this is the story of such a boy.

Haruto, who lived as an ordinary boy,
At some point, a goddess bestowed upon him the "Absolute No Damage Skill".
Haruto was still half suspicious, at that moment when he was still visiting a village,
after meeting the two sister adventurers Lilith and Alice, their path began to change dramatically.
Whether people or demons, he'll mow down his enemy as an adventurer ---!!

I like romantic comedies. However, romance doesn't develop like that in reality. There was once a time where I thought that. Encountering a girl who fell from the sky, my school life changes with a clang.

From the author of the popular harem comedy "Noucome" comes a new out of this world romantic comedy!

Welcome to the academy of Demons and Dungeons!

Kodo Ikusei Senior High School, a leading prestigious school with state-of-the-art facilities where nearly 100% of students go on to university or find employment. The students there have the freedom to wear any hairstyle and bring any personal effects they desire. Kodo Ikusei is a paradise-like school, but the truth is that only the most superior of students receive favorable treatment.
The protagonist Kiyotaka Ayanokoji is a student of D-class, which is where the school dumps its "inferior" students in order to ridicule them. For a certain reason, Kiyotaka was careless on his entrance examination, and was put in D-class. After meeting Suzune Horikita and Kikyo Kushida, two other students in his class, Kiyotaka's situation begins to change.

Mochizuki General Hospital boasts some of the most well-trained (and well-endowed) nurses in town. But though these ladies spend much of their day battling disease, their after-hours are spent fighting a very different sort of disease…Under the leadership of the hospital chairman, a handful of staff members and local teenagers form a group of mercenary assassins, targeting the “cancers” of society and excising those individuals before their wickedness spreads.
(Source: Yen Press)

Saphate is the second son of the Greed noble family.
He hates the way his clan squeezes the money from the population and the way it wastes it and when he went to oppose his family's way of act, he's kicked out.
Although he lost his job at the Magic Academy and become a wanderer, he managed to live normally with his former elf colleague and a cat maid that worked for his family and that left her work for following him...

This is a story that narrates his everyday life.

From Transcendence
Azusa, a normal high school girl, fell down the stairs while visiting her grandmother in the hospital two months ago. When she awoke, she was surrounded by people speaking of "The Priestess of the Dragon God," "The Imperial Capital," and "The Taisho (Era)."
The legend starts again with this work, commemorating the 15th anniversary of the Haruka series!

Nagumi Koushi is a 12-year-old boy who was abandoned by his broke father after their house caught on fire, leaving him to roam the streets penniless. Then one day, a girl named Minerva who finds him lying on the sidewalk takes him to a women’s college dormitory, one known for housing troublesome residents, and asks him to be their "Dormitory Mother." Surrounded by older women and forced to deal with their idiosyncrasies, Koushi starts his new (somewhat ecchi) life!

A college student buys a new apartment dirt cheap and the reason was that once the front door is opened from the inside it connect to a dungeon in another world instead so he goes to an adventure in the dungeon and meet new companions which treat him as a the Great Sage

All the Ore no Sora series deal with the Yasuda family. The first two series are about Yasuda Ippei. This is a Otoko Roman Manga and the genre is about Japanese men fantasizing about being successful in the world.

Rokudou is a loser, and everyone knows it. He gets picked on at school, gets snide looks from passersby, and can only muster up the courage to complain in secret with his equally hapless friends. Looking to turn his life around, he desperately uses an ancestral artifact passed down in his family for generations: a scroll that is capable of subduing all demons. However, in the modern age it has a different effect - it makes all bad girls fall in love with him.