I'm 95 % certain that being caught by Tracy during the "ninja shower" scene with Alice will cause bad end, even though you seem to get away scot free, my guess is there's a big negative to her points then not documented in the walkthrough. After getting bad end having done everything right except getting caught I redid it getting out of there (from the toilet after shower fondle scene; not sure if this matters) and got the good end. The only other variations I did were unrelated to Tracy like asking Alice to masturbate in one and spanking in another, lying to mom to get anal in one run and truth for threesome in one, all Tracy choices were the same in both plays.I've gone through several pages looking for this answer but can't find it.
The only ending I can get is the bad ending because Tracy keeps dying. According to the walkthrough, you need 6 trust points to keep her alive but I do all the positive things and none of the negative things and she still gets shot. Anyone else with this issue?
You otherwise need to enter her dream when you have the option to (being aware of her dark self is important for her to trust you), you need to be nice to her as much as possible (you can be forceful with her during papers and still save her, but then you need to be nice everywhere else). All mean instances withdraw a -1, as does lying to her, while the dream is worth +5 on its own.