Demons exist and their power is beyond what humans can fathom. In fact they are so strong that humans do not stand a chance against them in a fight. The only thing strong enough to defeat a demon is another demon and it is trough this logic that Ryo Asuka hatches the plan to have his good-hearted friend Akira Fudo possessed by a demon. If a person is of pure of heart then he might be able to control the demon that posses him and thereby acquire power equal to a demon. After raising some hell in a club the plan works and Akira is possessed by the powerful demon known as Amon. Now Akira is humanities sole champion of justice against the hidden demon menace that has plagued humanity since the dawn of time. (Source: ANN)

Vampires walk among society, existing as part of its underbelly. They do not require blood to survive, but extreme emotions can immensely increase their bloodlust, turning them into uncontrollable monsters. Tsukasa Taira, a 22-year-old university student, learns of the existence of vampires when her longtime friend reveals himself to be one of them after a tense confrontation with Yuuki Anzai—a human and vampire hybrid. Her friend is arrested, and Tsukasa soon finds herself drawn to Anzai, who reluctantly reciprocates her feelings. However, this unconventional romance may prove too difficult to maintain, as Anzai struggles to contain the part of him that wishes to devour Tsukasa.

Akira Fudou leads the life of a typical high school student. After a chance encounter with school bullies, he is rescued by his childhood friend Ryou Asuka. Ryou and Akira catch up over the course of an afternoon that ends with them crashing a party at a nightclub. Initially uncomfortable with the environment, Akira is shocked when violence provokes some of the club's partygoers to transform into demonic monsters. He and Ryou are only saved from the encounter thanks to the intervention of a great demon known as Amon. Amon possesses Akira, and the two together form the powerful Devilman⁠—a being that, due to the influence of Akira's strong empathy for his fellow man, is resolved to keep the human race safe from the threats of demonkind.

With a stray pitch that completely missed the batter, Eijun Sawamura loses his final middle school baseball game. Frustrated by this defeat, Eijun and his teammates vow to reach the national tournament once they are in high school. But everything changes when a scout unexpectedly invites him to Tokyo's prestigious Seidou High School after seeing the potential in his unusual pitching style. Encouraged by his teammates, Eijun accepts the offer, ready to improve his skills and play at a much more competitive level of baseball. However, now surrounded by a large number of skilled players, Eijun struggles to find his place on the team. He declares that he will one day become the team's ace, but that's only if fellow first year Satoru Furuya doesn't take the title first, with his breakneck fastballs that earn him a coveted spot on the starting roster. With the addition of these talented new players to an already powerful lineup, the Seidou baseball team aims to become the best in Japan, facing off against a number of formidable foes that stand in their way.