According to legend, Beelzebub, one of the seven princes of Hell, betrayed God and was banished from Heaven for eternity. Beelzebub now leads the kingdom of Pandemonium, where all former angels roam and work every single day of their immortal lives. A devil like him would give people chills at the mere mention of his name. But what if Beelzebub is not as evil as initially thought? What if he was obsessed with fluffy things? And what if Beelzebub is actually a woman? That is what new assistant Myurin discovers when he is hired to serve Her Majesty Beelzebub. She may know exactly what to do to keep Pandemonium running like clockwork, but whenever she leaves the professionalism of the office, the girl needs some assistance in order to function like a normal... devil. As much as Myurin can't stand being unprofessional, he is secretly obsessed with her adorable antics, and his new job teaches him that everything is not exactly what it seems, especially with the other head devils of Pandemonium.

High school student Kaname Sudou receives an invitation from a classmate to play Darwin's Game, a mobile game he has never heard of. However, as soon as he opens the application, a green snake suddenly pops out from his phone screen and bites his neck, leaving him unconscious. Waking up in the infirmary without any signs of a snake bite, he is told by the school to take the rest of the day off. Although he is puzzled by what has happened, he dismisses the surreal experience as a hallucination and boards the train home. Unfortunately, his curiosity gets the better of him and he uses the application once again. As the application appears to be just like any other battle game, Kaname breathes out a sigh of relief and decides to start his first match. However, the pleasant surprise is short-lived, as his in-game opponent unexpectedly appears right in front of him and attempts to hunt him down with a knife. As he desperately runs for his life, Kaname puts two and two together and realizes that Darwin's Game is not an ordinary game, but rather, it's a brutal fight for survival.

Kei Narutani and his childhood friend, Song Minghua, are Chinese refugees who are fleeing from the Zai, a mysterious organization that indiscriminately terrorizes their country and its people. Fortunately, during their escape to Japan, they are saved by a strange red aircraft. Kei's fascination with this aircraft leads him to meet his savior: a girl who is an "Anima"—the pilot of a unique type of airplane called a "Daughter." The girl goes by Gripen, an adorable JAS-39F fighter aircraft. Kei develops a bond with Gripen and is then recruited by the Japan Self-Defense Force to help Gripen overcome her troubles with flying. Later joined by Eagle, a carefree F-15J-ANM, and Phantom, a proud RF-4EJ-ANM, the squadron takes up arms, determined to protect humanity. Together, the five individuals battle against the invasive Zai, forming the last line of defense against the threatening alien force.

In professional sumo, there are no weight classes. It's a savage sport where the strongest survive, and anyone willing to test their mettle can step into the ring. There is, however, a minimum size requirement to be a pro sumo wrestler, and young Hinomaru Ushio, incredibly talented and hardworking though he may be, does not meet that requirement. This small boy has big dreams of reaching the highest class of sumo, Hinoshita Kaisan. The only way he could possibly go pro is if he becomes the High School Yokozuna, a title given to the strongest wrestler in high school tournaments. Ushio is under a lot of pressure, as well as a time limit. If he can't show off his skills in the high school tournaments, he may lose his chance to go pro permanently, and the odds are stacked against him. Instead of enrolling in Ishigami High, the best school for sumo in Japan, he enrolls in Odachi High and must build a sumo club from the ground up with the one devout member Shinya Ozeki. Odachi High is the true underdog of the sumo world, but Ushio has to push forward with all his strength if he is going to make it professionally.