You can be on any path, but the details change a bit for ntrs content. Just follow the steps Jiroah mentioned. And be aware that if you're on the lovers path when you do this you'll be immediately switched to happy path. Also, I think telling her to be more lewd helps, but I always play it that way so I can't say for sure whether low lewdness blocks you from any ntrs content or not.Sorry could you guys help me in triggering the ntrs route? Like do i have to lower some stats or let something happen or do i have to be in the ntr route or idk i only unlocked lover ntr and happy till now... or is there some guide?
After the camping trip when Liz ask about shopping let her go with Sam and pick show off options (suggest her to bend over, make her wear a revealing dress, ask for a pic, suggest to tease more, let her drink more).
At uni pick "show skin" and let her stay with the students
Make her wear a short skirt, and on prankster day let her go with Sam. Make Liz confirm it was your idea
After that each time you can choose between meeting Liz and letting her go with Sam always choose Sam, suggest Liz to buy and do lewd things. For the club don't go yourself, and ask Sam to bring Liz home.