Tousuke Rokudou is a first-year attending Aomori High, a school full of delinquents. He is often bullied by his classmates due to his incompatibility with their behavior, the only exceptions being his two good friends who are also social outcasts. Frustrated at the way they are treated, the three wish they could stand up and claim the fun, peaceful school life of their dreams. However, Tousuke's life takes a drastic turn when he receives a package from his late grandfather containing their family heirloom, a scroll said to possess the power to save him from impending danger. Upon holding the scroll, a sudden glow emanates, leaving a strange mark on Tousuke's forehead. Thinking that he's received the means to free himself and his friends from their daily treatment, Tousuke is shocked to find out that its effects are far different than what he had imagined. Although his bullying continues, he realizes that the mark from the scroll acts as a charm, capturing the hearts of delinquent girls—in particular, Ranna Himawari, the strongest of them all.

Fifteen-year-old Chacha is a typical teen with an atypical talent: she can communicate with cats. Though her friend Mito thinks this is the coolest ability in the world, Chacha finds her unique skill to be annoying at best and disruptive at worst. Whether she's dealing with countless strays proposing marriage, neighborhood cats offering to help her with tests or waking up to 'presents' on her bed in the night, Chacha's normal school life will be anything but!

At the academy Miami Takashi attends, higher education has sunk to the lowest levels of depravity, with armed hall monitors, teachers who wear masks to hide their identities and special detention sessions in a torture chamber beneath the gym! It's a curriculum designed to chew up sweet young things, and poor Miami's been voted "Least Likely to Survive" in her class! Is there no hope? Can no one save her? Enter Kekko Kamen, the most outrageous superheroine ever! Clad in a red mask, red boots and nothing else, she is the supreme protector of innocents like Miami. Armed with her trusty nunchaku and a body that just won't quit, she'll make chopped pork out of the swine who run this school from hell! But who is she really? The only one who knows for sure is creator Go Nagai and he's not giving anything away... except lots of free peeks at Kekko Kamen's magnificent physique!

Oraku is a lucky man. He has a comfortable job teaching at a local High School. He has Satsuki, a fellow teacher whom he hopes to marry someday. He has Aya, a beautiful student who has fallen in love with him. He has Aya's father, a wealthy man who wants so much for his little girl to be happy that he has sent her to live with Oraku. Oraku is a very lucky man. Of course Aya loves nothing more than to come on to Oraku by lounging around his apartment half naked. Unfortunately for Oraku, Aya's father happens to be wealthy because he is a major crime boss, and he will have Oraku slowly murdered if Aya doesn't remain absolutely pure. Now Oraku must not only restrain himself, but also protect Aya from the hordes of men and woman at school who'd love to get their hands on her body. And of course, if Satsuki or any of the other teachers find out that Oraku is living with one of his students, he will be permanently dismissed from the teaching profession! Oh yes Oraku is lucky...