Sex Liz when she first gets drunk, proceed (It whether you let her Stats go low will affect what kind of NTS path you get. Low stats will result in a "Low Will" Happy NTS)
Then proceed to the Camp event, then when prompted pick ALL "Cuck" lines
Exp: "What is that?"
(Liz has Jizz on her face)
MC "Wish it was"
And when you get to the University promo event Pick "Something revealing"
This should set you on that path