Turning against his former allies and enemies alike, Eren Yeager sets a disastrous plan in motion. Under the guidance of the Beast Titan, Zeke, Eren takes extreme measures to end the ancient conflict between Marley and Eldia—but his true intentions remain a mystery. Delving deep into his family's past, Eren fights to control his own destiny. Meanwhile, the long-feuding nations of Marley and Eldia utilize both soldiers and Titans in a brutal race to eliminate the other. Reiner Braun uses his own powers in a desperate bid to hold off Eren's own militaristic force, and his fellow Eldians—children Falco Grice and Gabi Braun—struggle to survive in the unfolding chaos. Elsewhere, Eren's childhood friends Mikasa Ackerman and Armin Arlert remain imprisoned alongside Eren's former Survey Corps companions, all disturbed by Eren's monstrous transformation. Under the blind belief that Eren still secretly harbors good intentions, Mikasa and the others enter the fray in an attempt to save their friend's very soul.

With the appearance of a mysterious virus that kills everyone above the age of 13, mankind becomes enslaved by previously hidden, power-hungry vampires who emerge in order to subjugate society with the promise of protecting the survivors, in exchange for donations of their blood. Among these survivors are Yuuichirou and Mikaela Hyakuya, two young boys who are taken captive from an orphanage, along with other children whom they consider family. Discontent with being treated like livestock under the vampires' cruel reign, Mikaela hatches a rebellious escape plan that is ultimately doomed to fail. The only survivor to come out on the other side is Yuuichirou, who is found by the Moon Demon Company, a military unit dedicated to exterminating the vampires in Japan. Many years later, now a member of the Japanese Imperial Demon Army, Yuuichirou is determined to take revenge on the creatures that slaughtered his family, but at what cost? Owari no Seraph is a post-apocalyptic supernatural shounen anime that follows a young man's search for retribution, all the while battling for friendship and loyalty against seemingly impossible odds.

Devils cannot take form without a living host. However, if the will of an individual is strong enough, they can overcome the demon and make its power their own, becoming a Devilman. Weak and unassuming, Akira Fudou has always had a bleeding heart. So when his childhood friend Ryou Asuka asks for his help in uncovering devils, Akira accepts without hesitation. However, to Akira's surprise, the place they go to is Sabbath: an immoral party of debauchery and degeneracy. Amidst bloodshed and death, demons possess the partiers, turning their bodies into grotesque monsters, and begin wreaking havoc. In a reckless attempt to save his best friend, Akira unwittingly merges with the devil Amon and becomes a Devilman, gaining the power to defeat the remaining demons. Though it grants him great power, this new partnership awakens an insatiable and primeval part of Akira. Having the body of a devil but the same crybaby heart, Akira works alongside Ryou, destroying those that harm humanity and his loved ones.

Takemichi Hanagaki's second year of middle school was the highest point in his life. He had respect, a gang of friends he could count on, and even a girlfriend. But that was twelve years ago. Today, he's a nobody: a washed-up nonentity made fun of by children and always forced to apologize to his younger boss. A sudden news report on the Tokyo Manji Gang's cruel murder of the only girlfriend he ever had alongside her brother only adds insult to injury. Half a second before a train ends his pitiful life for good, Takemichi flashes back to that same day 12 years ago, when he was still dating Hinata Tachibana. After being forced to relive the very same day that began his downward spiral, Takemichi meets Hinata's younger brother. Without thinking, he admits to his seeming death before flashing back to the past. Takemichi urges him to protect his sister before inexplicably returning to the future. Miraculously, he is not dead. Stranger still, the future has changed. It seems as though Takemichi can alter the flow of time. Given the chance to prevent his ex-girlfriend's tragic death at the hands of the Tokyo Manji Gang, Takemichi decides to fly through time to change the course of the future.