I'm very sorry for the late reply. When you're trapped in her house, to progress all you need to do is talk to either Fumiko or Satsuki at different times of the day. Talk to Fumiko first, if nothing happens, try Satsuki. If nothing happens, return to your room, spend time there, then try again with both girls. Next update will make it easier to figure out what to do, but for the time being, you know you're doing progress because time advances when you interact with either of them.