In Taisho-era Japan, Tanjiro Kamado is a kindhearted boy who makes a living selling charcoal. However, his peaceful life is shattered when a Demon slaughters his entire family. His little sister Nezuko is the only survivor, but she has been transformed into a Demon herself! Tanjiro sets out on a dangerous journey to find a way to return his sister to normal and destroy the Demon who ruined his life.

Source: https://kimetsu-no-yaiba.fandom.com/wiki/Kimetsu_no_Yaiba_Wiki

Kuroshitsuji follows the adventures of Earl Ciel Phantomhive as he, with his faithful demon servant Sebastian Michaelis, carries out missions under the banner of the Queen's Watchdog, all the while seeking revenge on those who made him and his family suffer - at the cost of his soul.

Source: https://kuroshitsuji.fandom.com/wiki/Kuroshitsuji

The legend of the confrontation between the Seven Deadly Sins and the Holy Knights.

Source: https://www.imdb.com/title/tt3909224/

The story follows the life of an average hero named Saitama who manages to win all of his fights with just one punch. This ends up being the cause of a lot of frustration as he no longer feels the thrill and adrenaline he once felt in battle. After all, what's so good about having an overwhelming power?

Source: https://onepunchman.fandom.com/wiki/One-Punch_Man

Twelve years before the start of the series, the Nine-Tails attacked Konohagakure, destroying much of the village and taking many lives. The leader of the village, the Fourth Hokage sacrificed his life to seal the Nine-Tails into a newborn, Naruto Uzumaki. Orphaned by the attack, Naruto was shunned by the villagers, who out of fear and anger, viewed him as the Nine-Tails itself. Though the Third Hokage outlawed speaking about anything related to the Nine-Tails, the children - taking their cues from their parents - inherited the same animosity towards Naruto. In his thirst to be acknowledged, Naruto vowed he would one day become the greatest Hokage the village had ever seen.

Source: https://naruto.fandom.com/wiki/Narutopedia

Young villager Tatsumi heads to the Imperial Capital to try to raise money for his village. After arriving, he discovers that there is corruption in the area. He is recruited by Night Raid, an assassin group, to fight the Empire and end the corruption. As part of Night Raid, Tatsumi joins self-proclaimed "genius sniper" Mine; kind-hearted Sheele who can become a cold-blooded killer when it comes to achieving her goal of getting rid of "society's trash"; and leader Najenda who spent years serving in the Empire before joining Night Raid.

Source: https://akamegakill.fandom.com/wiki/Akame_Ga_Kill!_Wiki

Brothers Edward and Alphonse Elric search for the Philosopher's Stone, hoping to restore their bodies, which were lost when they attempted to use their alchemy skills to resurrect their deceased mother. Edward, who lost only limbs, joins the State Military, which gives him the freedom to continue the search as he tries to restore his brother, whose soul is tethered to earth by a suit of armor. However, Edward and Alphonse are not the only ones seeking the powerful stone. And as they search, they learn of a plot to transmute the entire country for reasons they cannot comprehend.

Source: https://fma.fandom.com/wiki/Fullmetal_Alchemist:_Brotherhood