As frustrating as it may sound...you really do not need a walkthrough. Just follow the story to sus out the mystery and as you go decide which LI/LI's you want to hook up with and answer how you think they would want you to answer. I saved at critical decision points so I could return to that point if I didn't like my choice, or so I could try out a different branch of the story. WARNING, there are parts in the story where a particular LI is unavoidably thrust upon you for an H scene or two. I tried to go my first playthrough being faithful to Leah and shunning all other advances or the other LI's. I can think of at least Two LI's where I was forced by the story into an unwanted hookup.