If you're looking for manga similar to WorldEnd: What do you do at the end of the world? Mou Ichido dake, Aemasu ka? (Light Novel), you might like these titles.
Forced to retreat to floating cities due to an invasion of magical armored insects, humanity must now depend on Sky Wizards to battle the menace via mid-air battles. Once known as the “Black Master Swordsman,” Kanata Age is now considered a traitor and is assigned to lead an F-class of mismatched mages. Misora Whitale has all the enthusiasm to be a leader, but she's failed 100 consecutive tests. Rico Flamel is a genius sniper, but she's a little self-absorbed, and Lecty Eisenach is a candidate with all the ambition but zero confidence. It's up to Kanata Age to train the troubled trio to become accomplished Sky Wizards.
In the year 1939 an unknown enemy called the Neuroi appeared. Their purpose is unclear and origin is unknown, but they attack and destroy any signs of human civilization they come across. Because conventional weapons are useless against them, humanity developed a striker unit known as the Strike Witches to combat the Neuroi. Miyafuji Yoshika is a girl with exceptional healing power but lacks control; she has been scouted to join the Strike Witches and fight the Neuroi, but all she wants to do is take over her family clinic. After witnessing an attack by the Neuroi on her way to find out if her father is still alive, Miyafuji resolves herself to fight for and protect the people around her. Who or what are the Neuroi and what do they want?
Forced to retreat to floating cities due to an invasion of magical armored insects, humanity must now depend on Sky Wizards to battle the menace via mid-air battles. Once known as the “Black Master Swordsman,” Kanata Age is now considered a traitor and is assigned to lead an F-class of mismatched mages. Misora Whitale has all the enthusiasm to be a leader, but she's failed 100 consecutive tests. Rico Flamel is a genius sniper, but she's a little self-absorbed, and Lecty Eisenach is a candidate with all the ambition but zero confidence. It's up to Kanata Age to train the troubled trio to become accomplished Sky Wizards.
A discharged, and spiritually spent, soldier decided to shut himself to a small marine research isle. He was enjoying his solitary life as usual when he saw a nuclear explosion in direction of Seoul, Korea. His nightmare returns.
Kanata Sorami, a young Private in the army, arrives in Seize to serve in the Clocktower Fortress and learn the trumpet under the tutelage of Master Sergeant Rio Kazumiya. Though peace hangs uneasily over the world, Kanata finds a relaxing routine of laundry, shopping, and trumpet practice greets her at her new post instead of brutal drilling and discipline. With help from the other members of the all-female 1121st Platoon, Kanata finds her place in the bustling city, bringing joy and humor to the war-weary residents while learning a great deal about the world.
In the year 2016, a catastrophic incident at the Odaiba nuclear power plant contaminated the city with radiation and turned Tokyo into a ghost town devoid of life. 20 years later, Japan still struggles with the environmental consequences of that fateful day, and actively looks for survivors using Coppelions: genetically-engineered, radiation-resistant girls who scour the streets when SOS calls occur. With military support and funding to back them up, these young ladies continue to explore Tokyo and discover just who, and what, managed to survive.