Nani mo Nai Kedo Sora wa Aoi - Recommendations

• Vol: 8; Ch: 28
• 1969 - 1970

Ryu stows away on a space vessel, only to be found by the crew when it's far to late to return to earth. So they stick him in a spare sleep capsule instead. Things take a turn for the unexpected, however, when Ryu wakes up to find himself the sole survivor of the expedition, the spaceship having crash landed on a grossly mutated and wholly unfamiliar Earth. Joining forces with fellow survivors from a different crash, Ryu and his comrades fight to survive on this new and deadly Earth as they search for any humans that might've made it through the mysterious apocalypse.

• Vol: 26; Ch: 233
• 2017 - 2022

One fateful day, all of humanity was petrified by a blinding flash of light. After several millennia, high schooler Taiju awakens and finds himself lost in a world of statues. However, he's not alone! His science-loving friend Senku's been up and running for a few months and he's got a grand plan in mind—to kickstart civilization with the power of science!

• Vol: 7; Ch: 32
• 2015 - 2016

It’s the year 2125, and a strange plague called “Cagaster” appears. One-in-a-thousand people is infected by this disease, which turns humans into monstrous cannibalistic insects. Two-thirds of humanity is decimated... 30 years later, young expert bug exterminator and mercenary adventurer Kidou and newfound friend Ilie struggle to survive in this brutal new world, while delving into the mysteries of the plague and its causes. Kidou is tasked with finding Ilie’s mother, after being entrusted with her by her dying father. Meanwhile, the battle continues to rage against the mutated population of Earth, with the code possibly being cracked to finally end the nightmare.

• One Shot
• 1985

Rick has lived a normal life as a mechanic's apprentice in a world underground. That, however, is about to change as he bumps into a strange intruder who is not quite like anyone Rick has ever seen before. Venus, the intruder, claims to be from another world just like Rick's, though slightly different. With the police after Venus, can they figure out what is going on?

• Ch: 143
• 2016 - 2018

The third season in this second installment of Hive.

• Vol: 2; Ch: 13
• 2005 - 2006

Many years after a devastating war, Earth is now being watched by a group of beings known as The Third, named for the third red eye on their forehead that can access various computer systems. Navigating this barren, apocalyptic landscape is Honoka, a jill-of-all-trades who uses her powers to keep her friends from The Third's deadly grasp.

• Vol: 1; Ch: 4
• 2016

The world is a desert where trees and flowers are extremely rare.

• Vol: 6+; Ch: 57+
• 2019 - ?

A cosmic disaster changed the Earth forever, stripping away every last drop of color from the world. Mankind also changed: the familiar human face is almost forgotten in a world now populated wholly by mutants. Against the backdrop of a moody urban landscape, a lone wolf investigator named Avidia relies on both his wits and extraordinary gun to hunt down the world’s last hidden scraps of color. He soon crosses paths with a very special girl–one who just might hold the key to bringing back what the world has lost.

• Vol: 1; Ch: 8
• 2013

28 July 2061 was an unlucky day for Raiji, in which he was falsely accused of being a groper on public transport. That evening, he joined his friends, Yuma and Osamu, to watch Halley's Comet. The comet appeared to arrive a few hours ahead of schedule, but it didn't just pass by in the night sky. Instead, there was a blinding flash, and all the people Raiji and his friends had been watching with vanished. Not only that, but the area around them was suddenly filled with nightmarish giant mushrooms and twisted human faces. In this new, violent world, the three of them will encounter dangers human and inhuman!

• Ch: 3
• 2019

In a desolate world filled with ruined buildings, giant mechanical bugs, and a sea of poisonous red fog that blankets the land, a band of sisters travels from island to island. The girls are aided by the power of Kemurikusa, mysterious glowing leaves that their plant Midori produces, but the water they need to keep themselves and Midori alive is getting difficult to find. When they encounter a man who has lost his memory on their travels, they are suspicious of the fact that his body chemistry is nothing like their own; but their new companion is fascinated with Kemurikusa and ends up joining them on their quest for survival. What awaits them in this strange world?