If you're looking for manga similar to Karasu to Reijou: Inou Sekai Saikyou no Mondaiji Buddy (Light Novel), you might like these titles.
Class 1-A visits Nabu Island where they finally get to do some real hero work. The place is so peaceful that it feels like a vacation—until they’re attacked by a villain with an unfathomable Quirk! With All Might retired and citizens’ lives on the line, there’s no time for questions. Deku and his friends are the next generation of heroes, and they’re the island’s only hope.
The climactic finals are over, and U.A. is getting ready for the summer training camp. Deku and All Might receive an invitation from a certain person to go overseas to a giant artificial moving city called I-Island. This island, a kind of “science Hollywood” that gathers the knowledge of scientists from around the world, is holding an exhibition called I-Expo showcasing the results of Quirk and hero item research. In the midst of all this, Deku meets a Quirkless girl named Melissa and remembers his own Quirkless past. Out of the blue, the impregnable security system the island boasts is hacked by villains, and all the people on the island are taken as hostages! Now, a plan that could shake hero society has been put into motion! The man who holds the key to it all is the number one hero and Symbol of Peace, All Might.
The U.A. High School Hero Course teaches young hopefuls everything they need to become heroes. Between killer events like the Sports Festival and internships, there’s even Parents’ Day! That’s when all the kids get the chance to show their parents what they’re made of!
Monsters are on the loose! But luckily for the people of Japan, heroes are there to protect them, with powers that run on a rate of yen per second. For Hiasa Sen, however, there are many more important things to worry about, like catching sales on groceries, and his many part-time jobs, all to take care of his little sister. When danger approaches, however, he has a secret power of his own, but it may be more trouble than it's worth.
Since the government announced the existence of people with “special powers” 10 years ago, Shindo Susumu has longed for his own amazing abilities. However, he finds himself to be nothing but an average 15-year-old. Then one day, during his high school entrance ceremony, a power finally awakens inside him…but it’s not exactly the kind he’d always hoped for!
Koichi Haimawari couldn’t make the cut to become an official hero, so he uses his modest Quirk to do good deeds in his spare time. Then one day a fateful encounter with some local thugs leads him to team up with two other unlikely heroes. None of them really know what they’re doing, but they’ve got the courage—or foolishness—to try. But they soon discover fighting evil takes more than just being brave…
The Evil Ones (Evils) threaten humanity. The only ones who can fight them are the "heroes"! But are these "heroes" really on the side of humanity?! The story begins when Hideo, a boy whose life was once saved by a hero, learns the truth!
Five Indonesian teenagers have inherited the power to protect Marcapada; the realm known as Earth, as it is being threatened by an ancient evil entity called Kelana who seeks to destroy life and claim the world for himself. Stealing innocent souls through his minions, it’s up to the heroes to put aside their differences and combine their powers to defeat this ancient menace. Bestowed with powers of ancient spirits from five major islands in Indonesia, these young heroes commads a “Ruh”; a Guardian Animal that guides and protects them on their journey. Together, they are known as NUSA V: The Guardians of Marcapada.