Charge!! Men's School

When the Devil King announces his retirement, he calls forth his two sons, Yomi and Sora, to give them each a quest. Whichever of them finds a pure Yamato maiden within a year would inherit the throne of the Devil King, while the other would die. Thus begins Sora's sex-fuelled adventure to find a woman that can satisfy his father...

Set over 10 years after the conclusion of Sakigake!! Otokojuku, this manga focuses on Shishimaru Tsurugi, son of Momotaro Tsurugi from the previous series, and a new generation of Otokojuku students, while still featuring much of the same school staff. Like Sakigake!!, the plot focuses on the hellish training of Otokojuku, fighting enemies, and the births of new friendships. (Source: Wikipedia)

The prequel to Otokojuku focusing on the early life of Edajima Heihachi, principal of Otokojuku. The story covers his university days, his war efforts, and much more.

A spin-off of Sakigake!! Otokojuku focusing on Date Omito.

A spin-off of Sakigake!! Otokojuku focusing on Daigouin Jaki.

Thirty years after World War III, Japan has suffered immense damage from a dangerous weapon known as a "Man Bomb" which affected nearly all Japanese men and rendered them unable to fight, with other men giving their lives for their country. Heihachi Edajima, an Otokojuku veteran and survivor of the Man Bomb, starts up a new facility known as Onnajuku, a tough combat training facility, and begins training several Japanese women to fight for their country. The manga follows Momoko Tsurugi, a descendant of former protagonist Momotarou Tsurugi, who recently enrolls in Onnajuku. As spirited and tenacious as her ancestor, Momoko's catchphrase is "As a woman, I ain't dying! I, Momoko Tsurugi, will show you my burning youth!" (Source: Anime News Network)

A spin-off of Sakigake!! Otokojuku focusing on Akashi Gouji.