With Kitty, you might need to take her out on constant dates, give her loads of gifts, or just cheat I guess. With Mystique, I can't really say anything since she is a mod character after all, but if she's like Kitty, then maybe try these things as well, though in the future you can try to check in with the mod thread to see if there are any changes with Mystique. With Emma, she takes a long-ass time to increase her love, inhibition, obedience, ect. She's probably the most grindy character in the game so far (officially), so you'll need to actually grind her out unless you cheat for her as well. Let me know if this works or if you need any other advice on certain parts and I'll help as much as I can~
By different events, do you mean stuff like Rogue coming into your room in a tizzy, Kitty running away from you and stuff like that? If you just go through each of the characters, you should be able to unlock all their stuff eventually, though you will need to fool around in public eventually to get Prof. X to call you into his office so that you can use each of the girl's plans on him. As for a walkthrough, we can try to work on one, but it wouldn't be so much of a walkthrough, moreso a glorified list of how to unlock certain events. Let me know if I'm not getting the point here. Enjoy~