On the outskirts of Tokyo stands Hachimitsu Private Academy, anall-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, anall-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...

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?

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 taken a turn for the extreme as the Chairman's helicopter is about to crash into the academy! Time is of the essence, but who will survive?! It's the conclusion to the Sports Festival arc!

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...!

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!