Harem

Fuutarou Uesugi is a poor, antisocial ace student who one day meets the rich transfer student Itsuki Nakano. They argue but when Uesugi realizes he is to be her tutor, he tries to get on better terms. While trying to do so he meets four other girls.

There is only one Magi Craft Meister in the world. After the death of the last Meister over one thousand years ago, Jin Nidou was transported to another world in order to succeed her will.

After obtaining the knowledge of the Magi Craft Meister, Jin attempts to use a warp gate but it malfunctions, transporting him to an unknown place. Along with that, an automata he recently restored also uses the warp gate in order to search for her “father”. Thus, the crafting journey of the new Magi Craft Meister begins!

n regards to the MMORPG Cross Reverie,

In a certain world, there was someone who excelled in magic combat, people called him "Sage".
Seeking the strongest combat art, he devoted himself to research every magic and combat arts in existence. 

And the conclusion he arrived at was very cruel: "My body is not fit for magic combat".
Yet he didn't give up. 

He sealed his own soul with a magic art, to be reborn in a far-off future.
And in the completely-changed world he saw in his new life, the magic theory was of unbelievably low level.

“O, Hero!” With that cliched line, Kazuya Souma found himself summoned to another world and his adventure–-did not begin. After he presents his plan to strengthen the country economically and militarily, the king cedes the throne to him and Souma finds himself saddled with ruling the nation! What’s more, he’s betrothed to the king’s daughter now…?! In order to get the country back on its feet, Souma calls the wise, the talented, and the gifted to his side. Five people gather before the newly crowned Souma. Just what are the many talents and abilities they possess…?!

Yoshio Tanaka gets reincarnated into a fantasy game world, with healing magic as a “cheat” ability.

High school student Mikoshiba Ryouma was summoned to a different world in the middle of a war. Sensing the malice from the one who summoned him (a summoner of the O’ltormea empire), he uses his martial arts to run away, killing important people of the empire during his escape. After the escape, he rescues two twin sisters from the hands of thieves. The sisters who can use magic, swear to serve him as subordinates. Thus, Ryouma begins his journey on the path of the supreme ruler.

The story is about a guy who died due to a car crash because of a young couple making out (what bad luck!) And he was reincarnated into a fantasy world - but as a dragon! An extremely funny and powerful one! Let's see how our unlucky main character lives as a badass dragon!?

29-year-old programmer Suzuki Ichirou finds himself transported into a fantasy RPG. Within the game, he's a 15-year-old named Satou. At first he thinks he's dreaming, but his experiences seem very real. Due to his use of a 3-time-use special power (meteor shower), he ends up wiping out an army of lizardmen and becoming very high level. He hides his level and plans to live peacefully and meet new people, though developments in the game story (like the return of a demon king) might get in his way.

Arifureta Shokugyou de Sekai Saikyou Manga Summary: