A cheat code is a combination of letters or numbers that can give you something in the game after you enter it.
At this point, you can get in game money or make the characters were naked during the dialogues.
more = +5000¥
SexyLady = Yasuka always wear babydoll
MilfIsLife = Yasuka nude mode
VanillaYasuka = Yasuka default outfit
PyjamaParty = Noriko always wear pyjama
TsundereIsLife = Noriko nude mode
VanillaNoriko = Noriko default outfit
WaitThatsIllegal = Chiaki nude mode
PureTomboy = Asami always wear her jacket
MidTomboy = Asami without ugly jacket
WhatIsThat = Asami always wear ugly dress
TomboyIsLife = Asami nude mode (doesn't work at 0.4.91)
VanillaAsami = Asami default outfit
OppaiIsLife = Sakuya nude mode
VanillaSakuya = Sakuya default outfit
NetoriIsLife = Natsume nude mode
VanillaNatsume = Natsume default outfit
MacumbaEverywhere = Try this, trust me