After gaining the title of the strongest warrior in the world, Peter Grill has finally proven his worth and is ready to take the hand of his beloved senior, the beautiful and innocent Luvelia Sanctos. Peter expects to have a healthy relationship with her, despite some objections from her father. Unfortunately, this dream quickly breaks apart as news of his grand victory spreads among the womenfolk of other races—ogres, orcs, elves, and others—some of them even vying for his seed to produce offspring blessed with his might. To avoid betraying the trust of his cherished Luvelia and causing a scandal, Peter strives to avoid other women's salacious advances. However, accomplishing such a feat with so many alluring women on his trail is easier said than done.

Third-year high school student Jirou Yakuin is in love with his childhood friend and classmate, Shiori Sakurazaka. Thus, he hopes to be paired with her for the "marriage practical": their school's practice of randomly selecting boy-girl pairs to live as pretend married couples while monitoring and rating them on how close they have gotten. Meanwhile, the lively Akari Watanabe wants to be assigned to her crush, the popular and good-looking Minami Tenjin. Much to their dismay, Jirou and Akari find out that not only have they been paired together, but so have Shiori and Minami! Determined to be with their crushes, Jirou and Akari strive to earn as many points as possible, as the top 10 pairs earn the right to switch their partners—so long as both couples agree.

What do an alien, former ninja, weak telepath, and boy pretending to be a girl have in common? They are all classmates at Kashihara Girls' Academy, and they hide their true identities from the world. Rikka, Chiyo, Sekine, and Tsubasa seem like the best of friends, but they each harbor a monumental secret that they cannot reveal, no matter what. In order to continue masquerading as normal middle school girls, each of them must invent creative ways to conceal their true selves. But that is easier said than done, as the four students end up entangled in numerous shenanigans along the way.

After the events of Mask of Deception, the Yamato Empire is now ruled with an iron fist by a ruthless usurper who seeks to subjugate all before him. It's up to a couple of familiar faces to band together against the might of the Imperial army, and the fate of the world hangs in the balance as nations and generals must pick a side to fight with in this perilous civil war. Secrets will be revealed, friendships will be tested, and battles will be fought. Will peace and order be restored or will victory at any cost be the beginning of the end?