Make sure to build affection with MC first un the first 8 days of tutorials, then after a scene with the MC, the NTR will begin, either have the white haired boy have more affection than you to go to the other world and separate, both things will rield the scenes you are searching
Also for the white haired guy scenes you need to at least have spoken to the girls in their rooms before going to sleep at least once, then after that, every day when you go talk to one of the girls before sleep, the white haired guy will talk to the other girl you didn't talk to, effectively making you choose between the characters, in the other world is more simplistic, just go with whichever girl you want, after getting out of your house, the girl will ask if you want to separate, if you separate the gold haired guy will approach her, if he approaches at least 2 times the NTR will really begin, but I recommend that if you go for either, you should craft the contraceptives in the house next door in the morning or night, because if the pregnancy reaches 100%, it is game over.
