In pool with Aiko first time she's cleaning the house after school started, picking the choise that's supposed to give obidense really gives nothing. I'd bet there's more stuff like this in the game.
And like I've said earlyer, there's no way of knowing where to go or who to talk to for triggering events. Last time I said this I got the reply to pay attention to what thay said and look for clues in what they saying, but that only works like the few first minutes of the game.
There's also a lot of time when a character says or think something that would make more logic coming from MC.
I'm wondering if the creator of this game have tried it themselfs, if not I think they should