Ah, it's roughly translated guide from seiya-saiga. For it to make sense, you have to play it in "strange" order. (different than the flow of the text - save numbers give some hints). The order for this walkthrough to work is: Ayame -> Chiho -> Yuuki -> Mahiru -> Rinka (for example - going with this walkthrough, you create Save #6, which makes branch for Rinka's route, during Yuuki's "reverse confession" route)