The house where the girls will stay are already set.
Sancho, the characters aren't living in a house, or anything like a dorm.
They're going to be in their own apartments, with the underage characters having at least one parent living with them.
The setups should be a close mirroring of real life living in Shibuya, and Japan.
Take a look at what apartment buildings and complexes are really like in Shibuya, and throughout Tokyo.
All the characters will have real life worries to deal with, main one being about living on a budget, and carefully balancing their finance's, when it comes to rent and anything else.
Another thing to remember is our characters won't be the only ones living in these apartment buildings/complexes.
There will be other people living there, just like how it goes in real life.
Now, I don't know what your floorplans may look like, but keeping it close to their real life counterparts would be recommended.
Adult characters, meaning those 20 and over, will be living on their own, and all those under 20 will have at least one parent with them.
Please keep this mind in regards to what your floorplans may look like.
This new rpg will be kept as a very close mirror to real life living in and around Shibuya, Tokyo, and Japan.