When it's "night" go upstairs, and keep rotating between being in the hall and your room, or in the hall facing the stairs and the end of the hall facing the two doors. There seems to be at least two triggers for them: one being time in game, and the other a "random encounter"? I got all three peekings in about of week of game time. But, I've only been able to advance Rika. Don't get me wrong, her MILF game is STRONG! And she's got them Pixar curves going on. But, Katelyn interests me for her blushing. Haven't figured out how to interact with her at all...
Just got initial interaction and small chain with Cece. Did the wander back and forth thing in town at "night" again. This time I got an initial scene with Cece and Eros, then a scene with Cece alone, and after by checking the side porch of the Tavern I got another scene with Cece and Eros. That's pretty much it so far. After the second scene with Eros (Forest), when I got home I went straight to "bed", and got a visit from her. But, that's all I've gotten so far.