Zhuge Kongming earned a reputation as one of the greatest tacticians of the Three Kingdoms period of third-century China. Having led his army through countless grueling victories, Kongming falls gravely ill during the Battle of Wuzhang Plains. The weariness and regret stemming from the seemingly never-ending war catch up to him, and as he draws his final breath, Kongming wishes that if he were to reincarnate, he would be reborn in a more peaceful era. His wish comes true, and Kongming wakes up in modern-day Tokyo with a younger body and his memories intact. Thrust into an unfamiliar world, he finds his way into a nightclub and meets Eiko Tsukimi, an aspiring singer whose performance immediately captivates him. Pitying his confusion, Eiko takes Kongming under her wing and teaches him about the current world, which leads to Kongming's interest in contemporary music. Seeing Eiko's immense musical potential, Kongming vows to make the world recognize her and soon takes on the role of her manager. Unsurprisingly, the music industry is unforgiving to those who make even the slightest mistakes. Still, Kongming is determined to accomplish his goals—even if he must utilize the war stratagems he famously used in his previous life!

Following an encounter with oddity specialist Izuko Gaen, third-year high school student Koyomi Araragi wakes up in a strange, deserted void only to be greeted by a joyfully familiar face in an alarmingly unfamiliar place. Araragi, with the help of his girlfriend Hitagi Senjougahara, maneuvers through the webs of his past and the perplexities of the present in search of answers. However, fate once again delivers him to the eccentric transfer student Ougi Oshino, who brings forth an unexpected proposal that may unearth the very foundation to which he is anchored. As Araragi peels back the layers of mystery surrounding an apparition, he discovers a truth not meant to be revealed.

In a magical world where humans, demihumans, and oni are heavily at odds with each other, a princess named Saltorine Sally Aldike is on a journey to find a person named Mikoto Kibitsu. Traversing the world, Sally comes across many truths that she had been ignorant of due to her lineage—including the knowledge that the oni possess power potent enough to wipe out humanity. Seemingly blessed with a way to counter the oni's might, Sally has a strange power that manifests itself as a sigil resembling a peach, giving her superhuman abilities capable of defeating powerful oni with ease. Even so, Sally refuses to discriminate between humans, demihumans, and oni as much as possible, believing that peace between the three factions could be attainable one day. On the contrary, Mikoto—who also has the same ability as Sally's but with greater mastery—has a different goal. Mikoto is out to kill and torment all oni in existence, stopping at nothing to fulfill this objective. As Sally and Mikoto continue to cross paths, the power they possess will spell the difference between amicable coexistence and utter annihilation.

Located on the outskirts of Tokyo, Hachimitsu Private Academy is a prestigious all-girls boarding school, famous for its high-quality education and disciplined students. However, this is all about to change due to the revision of the school's most iconic policy, as boys are now able to enroll as well. At the start of the first semester under this new decree, a mere five boys have been accepted, effectively splitting the student body into a ratio of two hundred girls to one boy. Kiyoshi, Gakuto, Shingo, Andre, and Jo are quickly cast away without having a chance to make any kind of a first impression. Unable to communicate with their fellow female students, the eager boys set their sights on a far more dangerous task: peeping into the girls' bath! It is only after their plan is thoroughly decimated by the infamous Underground Student Council that the motley crew find their freedom abruptly taken from them, as they are thrown into the school's prison with the sentence of an entire month as punishment. Thus begins the tale of the boys' harsh lives in Prison School, a righteous struggle that will ultimately test the bonds of friendship and perverted brotherhood.