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.
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.