After finishing the game, during the END CREDITS, on the SECOND CONTROLLER, quickly press: UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, X, CIRCLE.

To get a confession from Ijuin, make a phonecall to Ijuin every Sunday (about 90 times.) When you do it over 10 times, some hidden events are triggered. If you handle the events well, Ijuin will confess to you.

To enable "friendly mode", at the initial character name screen, simply enter "MI-NN-NA" (everyone) as the Myooji (family name) in Hiragana, and enter "NAKAYOSHI" (friendly) as the NAMAE (Name) in Kanji. After doing so, you will start out the game with knowledge of all the girls and phone numbers.

NOTE: This trick can be used in correlation with the KONAMIMAN MODE code, but it is advised that using both codes at once will set the game at an extremely difficult challenge.

Choosing any one of the girls, take her to the Karaoke Bar three times. On the 3rd time, when the girl tells you that she wants to hear you sing, quickly press: UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, X, CIRCLE.

To enable Konamiman mode, at the initial character name screen, simply enter "KO-NA-MI-MA-NN" (in Hiragana) as the nick name (Adana). After doing so, virtually all your character's stats will be boosted up to 573. Yet, even though this does mean that you get to start out the game fully "enhanced" in every aspect. Note that your STRESS level will, too, be boosted at a dangerous level.

At the TWIN BEE TIME ATTACK SCREEN, quickly press: UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, X, CIRCLE. After doing so, your pilot will be boosted to full power.