It’s more like 50/50; with some choices, it’s not immediately clear, but there are indeed hidden "affinity points." At the same time, there are other choices where it’s obvious—for instance, that a particular option relates to Sayoki.
I like that mix! makes discovering the hidden routes more fun without making everything a guessing game lol. Btw, I've honestly had a lot of fun chatting with u about your games haha <3 would u be okay with moving our little game dev talks over to discord or somewhere else? totally fine if you'd rather keep chatting here tho!