Equally charming and stern, Heine Wittgenstein is a brilliant man who commands respect, despite his short, childlike stature. Thus, the king of Grannzreich has called upon Heine to undertake a daunting task that has driven away many before him—become the new royal tutor to four princes who are in line for the throne. The four heirs each have very distinct and troublesome personalities: Licht, the flirtatious youngest prince; his immature older brother, Leonhard; Bruno, the studious third prince; and Kai, the oldest of the four and the most reserved. Hilarity ensues as Heine attempts to connect with each of the princes in order to groom them for the throne. However, Heine's mysterious past and dark undercurrents in the present may threaten the harmony within the kingdom.

A year after the devastating battle against the formidable Zhao, the State of Qin has returned its focus to pursuing King Ying Zheng's ambition of conquering the other six states and unifying China. Their next target is Wei, a smaller state which stands as a geographic stepping stone for the sake of conquest. Xin, now a three hundred man commander of the swiftly rising Fei Xin Unit, continues to seek out lofty achievements in order to garner recognition for himself and his soldiers, motivated by those previously lost in battle. In the preliminary battles ahead of Qin's invasion of Wei, Xin finds competition in other young commanders who are of a higher social status than him. Back in Qin, the royal palace faces turmoil as opposing factions begin to make their move against Ying Zheng's regime. With their hands full both abroad and at home, Zheng and Xin must lead the way in this era of unending war, resolved to etch their names in history by creating a unified China.

Rei Oohashi is a burned-out office worker by day but otome game heroine Rae Taylor by night. After her long workdays, Rei immerses herself in the world of her favorite dating sim, Revolution, as a student at Bauer Kingdom's prestigious Royal Academy. Instead of focusing on the male love interests, Rei obsesses over the romantic rival: the game's villainess, Claire François. One evening, however, Rei's exhaustion catches up with her and she passes away. When Rei opens her eyes again, she finds herself reincarnated as Rae and in the presence of her beloved Claire. Given this miraculous opportunity, she wastes no time declaring her love for the golden-haired villainess and her endearing attempts at bullying. Winning Claire's heart is no easy feat, especially as the game persistently throws the three male leads at Rae—but she has no intention of allowing the dating sim logic to come between her and the one she truly loves.

High school student Haruka has always been a content loner. One day, he and his class are abruptly transported to another world and given skill points to use when choosing from an assortment of abilities and magical powers. Unfortunately, Haruka arrives last, and he can only use his points on the seemingly impractical abilities the others had no interest in. Although he is on his own again and must adjust to his new life by himself, he much prefers it that way. However, Haruka's peaceful solitude is short-lived, as he runs into some of his classmates. Weak to their pleas for help, he ends up sheltering and helping them reunite with the others. But the different cliques struggle to see eye to eye, forcing Haruka to find a way to end the infighting and restore harmony between them to survive the unfamiliar world.