When I woke up, I became the villain of a martial arts novel! But the body I possessed happened to be the extra character of a disastrous villain ? [Hyuk Ryeon-Un / The fourth son of Demon Sect. Leader / A ...

Shota Iijima picked up a mysterious erotic book during his childhood and has since then developed a severe fantasy onee-san fetish. Thereafter, from the years between his age of 12 to 15, he masturbated 999 ...

The storyline follows the daily extertions of Meiko's school life from the main continuity of the Prison School series, focusing on Meiko's senior high-school year at Hachimitsu Academy.