In the ecologically-minded city of Fuuto, mysterious devices resembling USB flash drives called Gaia Memories are used by criminals and other interested parties to become monsters called Dopants, committing crimes with the police force powerless to stop them. To make matters worse, the Gaia Memories carry a dangerous toxin that cause their users to go insane to the point where they could die from the life-threatening devices. After the death of his boss, the self-proclaimed hard-boiled detective Shoutarou Hidari works with the mysterious Philip to investigate crimes which involve Dopants. Using their own Gaia Memories, Shoutarou and Philip use the Double Driver belts to transform and combine into Kamen Rider Double to fight the Dopant menace and keep Fuuto safe. (Source: Kamen Rider W Wiki) **Note: *Fuuto Tantei* is a manga adaptation and sequel of the 2009 drama TV series *Kamen Rider W*.**

After the defeat of the demon lord Hadlar all of the monsters were unleashed from his evil will and moved to the island of Delmurin to live in peace. Dai is the only human living on the island. Having been raised by the kindly monster Brass, Dai's dream is to grow up to be a hero. He gets to become one when Hadlar is resurrected and the previous hero, Avan, comes to train Dai to help in the battle. But Hadlar, announcing that he now works for an even more powerful demon lord, comes to kill Avan. To save his students Avan uses a Self-Sacrifice spell to attack, but is unable to defeat Hadlar. When it seems that Dai and Avan's other student Pop are doomed a mark appears on Dai's forehead and he suddenly gains super powers and is able to fend off Hadlar. The two students then go off on a journey to avenge Avan and bring peace back to the world. (Source: Anime News Network) *Notes: Chapter count includes the respectively two and three chapter short stories "Derupa! Iruiru!" and "Dai Bakuhatsu!!" which were published in earlier Weekly Shonen Jumps pre-serialization and collected in the volumes.*

It's the Century of Darkness where monsters known as Vandels rule the world, and the Vandel Busters are the only ones who can fight them. When a group of Busters are killed in battle, they pass on their magic Saiga weapons to Beet, making him the strongest Buster ever. But Beet won't just fight the Vandels--he wants to destroy them and finally end the Century of Darkness. (Source: VIZ Media)

In the world, there are some evil creatures known as "chousha" (the kanji read "Chou" = "Omen" and "Sha" = "person") that can only be killed by Cremators, people who use fire to incinerate them. Source: My Anime List

Many Shonen Jump characters have big dreams, but this character's big dream is a nightmare! A very realistic reoccurring nightmare where a giant monster destroys a city. And it always ends with Kou, the poor dreamer, getting crushed under the rubble. But when Kou meets an unusual man who somehow knows about the monster in his dream, his nightmare takes on a whole new meaning. (Source: VIZ Media)

Following the events of the first Breath of Fire game, this sequel brings forth a new menace in the form of the Ice Dragons, a dragon clan secluded for a long time. With the fall of the Dark Dragons, the Ice Dragon clan decides to take their place and engage in global conquest. What is Nina going to do about it now that Ryu has gone missing? (Source: Manga-Updates)

A Dragon Quest: Dai no Daibouken spin-off focused on the past of Avan.

After the liberation of Papnica, Dai was asked by a certain boy to become his apprentice. After a few days of training, he heard rumors that there was a hero who learned Avan-style techniques, so he went to meet him hoping to learn and become stronger. Dai struggled under the guidance of an unfamiliar "master'', but...!?

The protagonists of this work, Gin and Prana, earn their living. They are warriors who live off the rewards of defeating monsters.