“Tenko” is Kohei Horikoshi's — mangaka of My Hero Academia — first published work back in 2007.

It stars the eponymous boy that has a tragic past, and his endeavor during war time in feudal Japan. He's the main inspiration behind a character from My Hero Academia that has a similar name.

In the world of Horikoshi Kouhei's Boku no Hero Academia, nearly everyone in the world has powers known as "Quirks". Normally, citizens cannot use their Quirks out in the open—doing so is a privilege reserved by law only for registered superheroes.

However, a stubborn few have chosen to reject this rule. They are known as vigilantes: people with the hearts of heroes, but the reputation of villains.

19-year-old Kouichi Haimawari always dreamed of being a hero, but didn't think he had a good enough Quirk. Instead, he would spend his free time sliding around town doing simple good deeds, like picking up litter or helping lost children find their parents. Content with his lot in life, Kouichi never expected to be thrown into the world of heroes, but his life is changed forever by an unexpected run-in with Knuckle Duster, a vigilante, an illegal hero.

On the once-peaceful planet of Industria, constant battles have been fought over control of the planet. Astro is a dim witted but kind boy who tirelessly works to feed his "family," a group of orphaned children. One day, after being fired from his most recent job, the prince of Industria, Bulge, appears in front of him. And even more shocking, Prince Bulge looks and sounds exactly like Astro! One thing leads to another, and Astro now has to take Bulge's place as the heir to the throne of Industria! Suddenly, he's faced with the task of bringing peace and harmony back to this war-torn planet!

- Red Hawk NEO

Aoi Hana is a normal female high-school student, though she is extremely clumsy and thus tagged as good-for-nothing. But Hana wants to change herself and decides that finding a part time job would be taking the first step in that direction. Being an animal lover, Hana's job of dreams is encountering animals day-to-day and taking care of them - the zoo sounds like the perfect place for that. So when she happens to see a job offer from a local animal park it's settled she'll attend a job interview.
When Hana arrives at the zoo everything seems just fine. The "Oumagadoki Zoo" might be going south but altogether it's your regular animal park. Just a very normal zoo, one might think. But that is only until Hana gets to meet the zoo director...

The appearance of "quirks," newly discovered super powers, has been steadily increasing over the years, with 80 percent of humanity possessing various abilities from manipulation of elements to shape-shifting. This leaves the remainder of the world completely powerless, and Izuku Midoriya is one such individual. Since he was a child, the ambitious middle schooler has wanted nothing more than to be a hero. Izuku's unfair fate leaves him admiring heroes and taking notes on them whenever he can. But it seems that his persistence has borne some fruit: Izuku meets the number one hero and his personal idol, All Might. All Might's quirk is a unique ability that can be inherited, and he has chosen Izuku to be his successor.
Enduring many months of grueling training, Izuku enrolls in UA High, a prestigious high school famous for its excellent hero training program, and this year's freshmen look especially promising. With his bizarre but talented classmates and the looming threat of a villainous organization, Izuku will soon learn what it really means to be a hero.

Note: Nominated for the 8th Manga Taisho Award. Won the Harvey Award for Best Manga of 2019.

A spin-off manga includes various comedy gags of characters in the main series.