Hold L, R, or L + R , then press A when selecting a character to choose between three new color schemes.
Bonus options
Press L or R at the configuration screen to access full gauge, auto block, life gauge, and other new options.
Play as Genichirou
Complete 10 hours of game play. Press Down to move outside the window of the character selection screen to choose Genichirou (Asuka's school principal).
Play as Tetsuko
Complete 10 hours of game play. Press Up to move outside the window on the character selection screen to choose Tetsuko (Asuka's teacher).