Set in the near future, at the privately-owned Tokyo State Prison. Like the chilling wind of the end of a century, a mysterious man with a six-pointed star on his fist entered the pen.
Saiga Riki-Oh--serving a term of three years, due to assault, his first offense. Riki-Oh openly antagonizes The Four Emperors, four powerful prisoners that control the prison and keep the rest of the inmates in line.
Tatsuya is really talented but also a bit of a slacker. Since middle school, Kazuya has received awards and recognition for excellence as a pitcher and baseball player. Tatsuya, however, is more inclined to let his brother take the limelight, as he is unwilling to directly compete with Kazuya. This includes Minami as well; while most people (including their parents) suggest that Minami and Kazuya will make a perfect couple, Minami tends to prefer Tatsuya.