Koizumi Takashi a salary man dies with the skin of banana. if he can reach the magical Fountain of Purification which resides at the bottom of a difficult dungeon, he will be allowed into Heaven. But to that he needs to conquer the dungeon by summoning monsters.His first monster was a lvl 1 female goblin.

For 820 years he had slumbered with no knowledge of mankind's advancement and scientific progress. The land which he once knew has become an unfamiliar place with new technology, attitudes, and lifestyles. Upon awakening, Cadis Etrama Di Raizel (called Rai), seeks to familiarize himself with this era. He locates a loyal servant of his, Frankenstein, who is currently the principal of a high school in South Korea. Rai decides that this school is the perfect place to help him learn about the modern world, enrolls, and begins associating with a group of good-natured students in order to 'blend in.' But this new world is no safer than the old; and the dignified, bewildered, technologically inept Rai finds himself embroiled in adventures both ridiculous and dangerous.

A battle tournament to decide who is the little sister number 1 of Japan begins!

Years ago, the gods fought against each other before being sealed away. However, their artifacts remained in the souls of the HuaXia clan as part of a contract and hope that someday in the future, they will awaken once more using those artifacts...

Rita is a normal and optimistic girl, but convinced by her hardcore gamer friend, she delves into the world of MMORPG gaming for the first time.

The last thing Cecilia Torrance sees is snow falling on her blood-soaked hand, in the middle of the road. Before she knows it, she is standing above her corpse, looking down on it. Nobody can see her, with the exception of a suit-clad man and woman, claiming they're there to take her to the afterlife.

A deadly android was delivered to me on my birthday!.. 
This is a Manhwa by Songa Min. Set in the near future, follows the life of Nano, a classified Android.

Katou Ryou owes a lot of money that he has no way of repaying. When he's violently kidnapped by thugs, he is terrified that they're finally going to kill him. To his surprise, he is offered a chance to live...by becoming an underling in an organized crime gang. Relieved to have escaped death and impressed by his handler -- the cool and competent Asamura -- Katou rises to the challenge. Now it's sink or swim as the young man embraces this new phase of his life!

Fuse, a knight with a prowess for fighting is brought inside a world he isn't used to by a young girl, his destiny was to be trained by her to fight on the great magic apocalypse where all knights and magicians collide, but, not only is she a magician, but she also knows the future! Why did she decide to train him, is this encounter a good omen or should he beware of his future.

A young, large-breasted ninja girl is captured while trying to steal a legendary sword. In the prison cell, she meets the true owner of the sword, Raikoumaru! Working together, maybe they can break out and reclaim the sword from the powerful collector, Asano!

"One such setting is the "Nine Schools Battles", officially called The National Magic High School Good Will Magic Competition. Every year, the best Magic High School students gather together, unfolding a story of frustration and glory by putting their young pride on the line."

(Adaption of Light Novel v03-v04)

The maid cafe's shop owner is always away throughout the year, but the two maids keep the shop oderly, neat, and tidy. Suddenly, supernatural attacks disrupted the peace in the shop, and the maids got into fights with them. Together with the male protagonist, Mo Qi and his hidden ability, they undo the manipulation, protect citizens. However, it seems like the shop owner has some sort of connection with these supernatural events, which leads to a big secret...

Kinnikuman (Muscleman), a weak and clumsy super hero, constantly getting into wacky situations. As the series progressed, the story began changing from comedy to action as Kinnikuman battles stronger and stronger foes in the wrestling ring. The series continually introduced new Super Human characters, known as Chyo-jins, who would challenge Kinnikuman and his friends for various purposes.

Note: Received the Shogakukan Manga Award for shōnen manga in 1985.

The original run was from 1979-1986 and ended with Vol. 36. The series directly continued in 2010.

One of the manga adaptations of Hypnosis Mic, The Dirty Dawg tells the story of the original four main characters.

Endou Kiku, a delinquent lone wolf, is pissed off with the world and everyone in it. Until he meets Senji and Sanji, who were just like him until they met each other. This one volume story follows Kiku as he finds out what it means to have friends and not be alone in the world, while also kicking ass and taking names in the meantime. This is the original Takahashi Hiroshi delinquent manga, predating his more famous works Crows, QP and Worst.

After dying, Sena Kaito was reborn in another world and confronted with a peerless beauty, Elisabeth, who had appeared before his eyes. Introducing herself as "Torturchen," she commanded Kaito to become her servant, but he refused on the spot. When Elisabeth presented Kaito with the choice of either torture or butler, he immediately submitted and began to serve at Elisabeth's side, to accompany her until she completed her mission.

From PopulationGO

Sorato Kenzaki is an ordinary boy whom attracts not so ordinary women. He constantly gets confesses to by weird, and often dangerous, girls. So when a rich ojou-sama asks him to become a hero he plays along and agrees. But lo and behold he actually gets transformed into a superhero!

In a world after death, angels fight for their fate and their future. Yuri, the leader of the Shinda Sekai Sensen, rebels against the god who destined her to have an unreasonable life. On the other hand, Tenshi, the chairperson of the student council for the world after death, battles against the SSS members. SSS members utilize armed weaponry to battle it out against the angels harnessing supernatural powers.

A manga adaptation of the popular game, Hollow Realization takes place in the VRMMORPG game Sword Art: Origin and sees Kirito and friends traversing the land of Ainground, a rebuild of Aincrad, when they meet a mysterious NPC girl named Premiere who hasn’t been coded into the game. Vowing to protect her, they search to uncover the truth of her null coding while also contending with players who want to erase her existence from the game.

From MangaHelpers: The Comp is a popular portable game system that also functions as a smartphone. But it suddenly becomes a portal for demons to travel to the human world! Kazuya receives three Comps, from his master programmer cousin Naoya, for himself and his two friends Atsuro and Yuzu. In order to survive the demon invasion, the trio have to use the Comps to summon and subdue the demon that appears in order to fight back against the waves of demons that are about to swarm Japan! [vyc]