Here`s the question
Even Though I follow the Playthrough, I can't do the "Rooftop climb" with Nell at D28
How could I fix it (Cheat mode activated)
Well, if you are following the playthrough, then you must follow it exactly. Accidentally miss an important action on a previous day and the whole house of cards comes crashing down, because it doesn't explain why you are doing things, and it's easy to miss doing the one tiny thing that lays the groundwork for a later event. This is why linear action-by-action walkthroughs suck.
Most likely, you missed spending an afternoon with Nell. She pushes you away when you try to kiss her if she doesn't like you enough. There are three things you can do to make her like you better: spend afternoons with her, tell her she's beautiful the first time you talk to her at the stables (requires 2 charisma), and bring her a romance novel the second time you spend the afternoon with her. Usually spending two afternoons with her is enough to make her like you well enough, but if you didn't complement her and didn't choose the romance novel, then you'll need to spend one or two more afternoons with her.
If you refer to my guide, you'll find information on what you need to do to complete each relationship path.
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