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Therefore, please, can anyone post a detailed walkthrough?
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It's hard to write one as you may have figured.
It depends on playstyle and preferences in the girls.
As progress is in most cases linked to other ingame characters and their relation to MC and progress as well, it's really hard to write a common linear wt.
e.g. if you start to write a wt on Meredith, her progress is linked to Melvin's hidden shop, to Mitchel who names some state authorities, those at laboratory.
If you hadn't progressed with their story, the Meredith wt is stuck.
Same to ...., ...., and so forth...
or e.g. Taylor .... dunno, where a wt should start at to unfold her "naughtier" story after facing her thong at work. How many characters are previous her scenes involved which are also linked to other characters? Audrey, Dominic, Cecilia, Claire (photo session progress) and therefore Melvin as well, Mitchell and his Maid but Whitney and the hospital crew as well...
If you hadn't figured how to progress with those, the single character wt on her is wasted...
Either stick to the step by step wt or look up Horizontical's wt on patreon. The hindrance would be, if there would be some real randomized events (which aren't) with a programmed "chance" to happen.
And if you are stuck somewhere, there is/was always someone answering on f95zone