Shion and Nezumi ~ I hate people forget that this was the first (?) anime with a low-key boyxboy relationship that wasn't based around sex or anything! Everyone says Yoi is but they always forget that this was first and the manga came out in
Add laundry room on the main level. Take space from the oversized master bathroom. Make Bed a second living room. Two bathrooms upstairs converted to one, better laid out bathroom. Eliminate the ground floor rooms (possible future).