
If you're looking for manga similar to Summer Hero, you might like these titles.
When the Raven starts to sing, people die... An unstable world, a weak government... and Mafia's escaping from their sins... In order to reduce unpunished crimes committed by the mafia... A Strength was born... Its agents are merciless and they kill withought hesitation. The Last Enforcement Organization known as Red Raven.
The "saber" are immaterial entities that take possession of the body housing to protect our world by exterminating the "frame users" from another dimension. So that when possessed the bodies hosting lose consciousness, Kaon, our heroine, keeps hers. How would she cope with horrific monsters who threaten it now?
Follow JSDF officers Yamato Yoshikazu and Sakimori Konoe as they face off against monsters of unknown origin that infest the troubled, disputed waters of the East Asian sea and have humans as a preferential prey!
Throughout the world, it has become commonplace for giant "monsters" to attack towns and cities. In such a world, the reason that Haruto stands up and fights isn't for peace, nor for his family, or for his girlfriend, but...
Tatsuo Kagura was born the son of two geniuses. Inheriting their great talent, he has grown to be a super genius boy, something like a mutant. Tatsuo's parents were treated like monsters due to their outstanding abilities, and murdered by someone who hated them for it. Tastuo, left alone, comes to learn of his parents' cruel fate, and spends the rest of his life seeking vengeance. Tatsuya turns 17. The time has come, and he is ready to take his revenge. He wears a skull mask marking him as messenger from the land of the dead, and identifies himself as Skull Man. Together with GALO, an artificial creature and a product of his father's research, Skull Man tracks down and destroys all those connected with the killing of his parents, and lays a trap for the real culprit hiding in the shadows.
Thirty years ago a series of meteorites rained down on Earth, destroying much of civilization. Decades later, pockets of humanity are beginning to reemerge, but many of the children who have been born after the crisis have been mutated by radiation from the meteorites. They are called the Meteorite Breed. Tooi, a fourteen years old kid that eats a lot, is one of the Meteorite Breed. But he is a rare one...
Earth is under attack from otherworldly creatures known as Evolutionary Invasion Objects, and only the agents of DOGOO, a government organization, can keep the monsters at bay. Armed with special weapons infused with the souls of distinguished historical figures, these fighters, recruited by an alien who watched its planet be destroyed by the Objects, are humanity’s best chance against the invaders. Teenager Shio Ogura used to be nothing but a loner and a military otaku, until one day she and her class went on a field trip to Taiwan and found themselves smack dab in the middle of an Object attack. To help save a new friend, the girl picks up a gun infused with the famed samurai Nobunaga Oda, thus securing her fate as the newest member of DOGOO, and protector of humanity!
Begins with the arrival of the "Enemies," giant, indestructible monsters that cannot be negotiated with. The Enemies drive humanity to the brink of extinction. A lone boy stopped them with his "moonfall strategy," but he disappeared soon after. After three years, a boy known as Kyle Kamishiro appears on the outskirts of a city. When monsters attack again, he demonstrates the power to manipulate the odds of probability. Despite his efforts, he is afterward drafted into the "Guilty Children," a unit of children who are guilty of crimes.
Hayato's city is devastated by a giant robot, his parents are killed in the massacre. The only friend left to him is his dog Jack, the only things left are mom's shoe and a picture of a man and a woman who, as his father tells him on his deathbed, are his real parents. Now Hayato wants revenge on the one who is said to have sent the robot: the terrible Ghost Ship which threatens ships and is rumored to wish to exterminate everything.
After the case occurring in 2116 in the Southeast Asian Union (the SEAUn), Shinya Kogami continues to wander. In a small South Asian country, Kogami rescues a bus carrying refugees being attacked by armed guerrillas. Among them is a girl named Tenzing. Tenzing begs Kogami to teach her how to fight in order to take revenge. What kind of world exists wherein a girl seeking revenge and a man capable of exacting his own both see possibility in the margins of a place with no way out?