Based on a story from the After School Series line of light novels. Kenichi Akizuki and Misako Watanabe work together to solve the mysterious disappearance of their classmate Ryouko Miyazaki. The only clue left by the kidnapper is signed Koushin Okazaki, her late classmate who'd committed suicide to preserve his youth and become like Peter Pan.

The girly but bloody otome game re-imagining of Lewis Carroll's classic fantasy novel Alice's Adventures in Wonderland with bishounen characters and added romance. A parody of Alice's Adventures in Wonderland where Alice is smart and non-doormatlike. In this story, Alice is not all what she seems. She is practical, strong, yet darkly cynical. Instead of the tradition story, Alice is kidnapped unwillingly by a mysterious (yet somewhat bishie-looking) man with bunny ears into a place call Heartland. Stuck in Heartland due to a trick by the mysterious bunny eared man, she meets the residents of this world. Along the way, Alice meets Blood, handsome mafia leader; Ace, the psycho yet charming knight and more... What should Alice do in such a world!?

Tokiro Ehara, an idealistic geeky professor, begins teaching at an exclusive high school for girls, with hopes of meeting young innocent minds in their most fragile state. Unfortunately, on his way to work, he meets 18-year-old Miyako and finds out that she is one wild student that needs to be taught how a prim and proper teenager should behave. He starts to believe that he is just the right person to teach her. Miyako, however, has other plans, and she's not above using her seductive wiles to lure him into submission.

Misaki Takahashi is a regular high school student who is preparing for his university entrance exams. In order to reduce the stress of studying, or so he hopes, he accepts the help of his older brother's best friend, and famous author, Akihiko Usami. However, Masaki is about to find out that Usami's books are of a very naughty genre, and that there may be something naughty waking up inside Masaki as well. Junjou Romantica also follows the story of two other couples loosely connected to Masaki and Usami's "Romantica." Egoist shows the very passionate, but often complicated, relationship between university professor Hiroki Kamijou (whose life has reached an all time low) and paediatrician Nowaki Kusama, who falls for Hiroki at first sight and would do anything to make him happy. The third story, "Terrorist," shows just how obsessive love can become when rich eighteen-year-old Shinobu Takatsuki finally discovers something that he cannot have so easily—the literature professor You Miyagi. There is passion abound as these three couples try to achieve their goals in life while also falling into temptation and anguish with their partners.