On the outskirts of Tokyo stands Hachimitsu Private Academy, an all-girls boarding school for elite young women. But as the new school year rolls around, one tradition is going out the window: For the first time in the school's long history, boys are being allowed to enroll. On the first day of school, though, it turns out only five boys have made the cut. Thrilled by this discovery, these young men's adolescent hearts leap with joy at the thought of being surrounded by all those girls, but little do the five boys suspect the shocking fate that awaits them...
On the outskirts of Tokyo stands Hachimitsu Private Academy, an all-girls boarding school for elite young women. But as the new school year rolls around, one tradition is going out the window: For the first time in the school's long history, boys are being allowed to enroll. On the first day of school, though, it turns out only five boys have made the cut. Thrilled by this discovery, these young men's adolescent hearts leap with joy at the thought of being surrounded by all those girls, but little do the five boys suspect the shocking fate that awaits them...
Will the hole in the wall that Kiyoshi and Gackt have been digging to aid in their prison break lead to a hole in Kiyoshi's heart instead?! The daring duo was prepared to risk it all to make Kiyoshi's sumo dream date with Chiyo a reality, but when more obstacles come into play, their hopes turn to despair. But nothing can deter a hormonal teenage boy! More desperate than ever, the two put everything they have into the plan...with Gackt sacrificing something precious!
The Shadow Student Council, determined to drive its prisoners (the boys) out of the academy, gets its Expel the Boys Operation (E.B.O.) underway! But the boys have internal turmoil to deal with too. Shingo's still picking on Kiyoshi, and Gackt's Guan Yu figure suddenly finds itself in the direst of straits! The E.B.O. is relentless, however, and the longer it continues, the more Kiyoshi and the others find their friendships, bonds, and hearts being destroyed...Is expulsion really the only way out?
Time is running out for the five boys of Hachimitsu Private Academy! With their expulsion looming, it's time to stake life and limb on making a prison break and baring the Shadow Student Council's misdeeds! And having challenged the vice president to an arm wrestling match, they might actually lose those limbs...
The day of the cornered male prisoners' expulsion comes and goes, and the tale takes a new turn as the roiling fates of both the boys and the girls play out! Kiyoshi and company finally break out of prison and are hard at work enjoying their peaceful school lives...but a storm is brewing, and Mari, Meiko, and Hana of the Shadow Student Council find themselves behind bars!
An unthinkable "nightmare scenario" is brought down on the Shadow Student Council, shaking the Prison to its core...!! Kiyoshi falls into the trap laid by Kate, the Regular Student Council President, and finds himself behind bars once again! Now Mari, Meiko, and Kiyoshi must share a co-ed Prison. Meanwhile, Kate's plan for revenge is quietly set into motion...!
While they may be enemies, Kiyoshi and Mari need to work together like their lives depend on it--because they do! With snake venom coursing through Mari's body, the only way to save her is for Kiyoshi to get his lips between her thighs. But as the two slither and writhe, are they only falling prey to the machinations of the Official Student Council?
Chiyo thinks there's something going on between Kiyoshi and Mari, and her response to Kiyoshi is rather bold! "You can feel them, if you'd like." Get a handful, or don't? Start with the left one, or the right one? In the hell that is the Prison, is this a brief visit to paradise?
Mari's prison escape plan lies in shambles...or does it? A confident Kate suddenly feels a chill down her spine at Mari's bold declaration: "I've already escaped." As the two grapple with each other both physically and mentally, are they headed toward a little bit of mutual demise-like a snake eating itself out of existence?
Ever since Meiko regressed to a childlike state, she has lost the monstrous strength that made her the ultimate jailer. But now, more than ever, Kiyoshi and Mari need to bring back the old Meiko. Can they revive the former Shadow Student Council vice president buried deep within and take down the Official Student Council?
The Shoulder Wars competition between the Shadow Student Council and the Official Student Council begins, and whichever side loses must disband! Vastly outnumbered, Mari knows their odds of winning are long, even with a partially resurrected Meiko to bolster their forces. To save the Shadow Student Council (and his date with Chiyo), Kiyoshi must rise to the occasion, fighting the army Kate has amassed...by going full mast!
Shoulder Wars has come down to a direct confrontation between both student councils. Kate forces Mari and Meiko into a catch-22 that threatens to leave the two exposed in more ways than one. But could Kate's desire to humiliate the Shadow Student Council backfire? Mari and Meiko's friendship is long and strong, and underestimating it could be the mistake of a lifetime!
The battle between the Shadow and Official Student Councils takes a turn for the extreme when an out-of-control helicopter carrying the chairman careens toward the school! In a crisis where time is of the essence, the only way out lies in fortune and serendipity. As the Shoulder Wars competition rockets toward its conclusion and aftermath, Kiyoshi, Hana, and the rest of the students at Hachimitsu Private Academy will learn that fate can be as cruel a mistress as the Shadow vice president…!
From daring prison escapes to the near destruction of their entire school, the boys of Hachimitsu Private Academy have been to hell and back countless times. Now, Kiyoshi is dead set on confessing his love for Chiyo, but one last gauntlet stands in his way. While he’s always thrived in times of crisis, has Kiyoshi finally gotten too big for his britches? It’s the wet and wild end of Prison School!