I like that concept! Maybe the opening CG could be similar to this cg, and you could choose routes depending on which half of the screen you clicked on? I don't know if renpy has that option, but I'd love to look into it. >>3383340
Kolio hidden route would be a good Easter egg. I vaguely know how to do that too so it wouldn't be a too hard. I'd like to make it one of those things that you really have to work towards too. What would you guys want in a Kolio route? Maybe something cute where (if it's in a school setting) Galo finds him in his desk, and it's mainly just Galo caring for the little guy?
If you guys really want smut too I could add that, but they'd have to be in their third year of highschool because I'm not okay with writing minors fucking as fap material for adults.