Limited, but yes. There is sandbox for wandering around to rooms of the house, and the day is divided into time periods (morning, afternoon, etc.), with the ability to to skip to another time. But I don't think it's bad. You can see clearly where everyone is at any given time, and there's also a map in the top right to jump to a specific room (instead of clicking door, then stairs, then door, etc.). So if Girl X should be in Room Y at Time Z, just skip time until you see her there on the map, and then jump to that location to trigger the event.
Personally, I think it's pretty straightforward; even if it says something like "Wait a while" or whatever, just skip time for a day or two and then leave the MC's room to trigger an event. Other than a little wandering to find specific events, it's pretty much like a VN (choice menus that often affect girls' stats). So, maybe 70/30 (VN / sandbox light)? Something like that, anyway. Also, there are plenty of repeatable activities with girls in the sandbox areas outside of events.