Hey Jikei, you should add in hints as to how to unlock girls, for example Anastasia's unlock hint would be something along the lines of "maybe i should check out the beach" or Fuyumi's would be "I'm craving Japanese food today, i heard there's a restaurant called Tsundora". Having unlock hints would certainly help make the game just that bit easier, especially for harder to find girls like Dahlia and whoever that 18th girl is.