Didn't he move again for a transfer? I'm really confused where everyone lives right now.
Honestly, you're kinda right. It's super confusing. My guess is that he has a place in Tokyo where he regularly works. Currently, he is working from his old family home. They are currently in the process of moving her stuff to his new place in Tokyo where they are planning to look for a new apartment.
Though they haven't shown anything about his place, so I'm not completely sure. The author says in his notes that he wanted to show them at Tatsu's place, but he couldn't for "consistency reasons" which have yet to be seen.
・りーちゃん134
辰巳のアパートに一回引っ越す予定で自分も描いていましたが、急遽様々な理由で変更となりました。いろいろと整合性を合わせる回となっております。
"I had originally drawn them moving into Tatsu's apartment, but I quickly changed it for other reasons. I'm using this chapter to keep various things consistent."