Why? That's not what most the readers are here for.
How would you know? Have you taken a survey?
It is not the case of being here for it, but it is supposed to be a story thread an yet it always fails to deliver. You would need to be severely emotionally stunted if you are here for ecchi minus any emotional connection. Ecchi is seasoning, not a main course. There needs to be something of substance under it. You can't be here for the main plot, since we never see any teachers or schooling going on.