@dethduck Butt where would he go? For all intents and purposes, he's an orphan with no family. That's kind of why he is in this situation in the first place.
1. He had a huge debt to pay up left behind by his parents who are now making a trip around the world or so.
2. Onee-san has enough money and influence to easily pay up that huge debt.
3. The parents transfered the rights of legal guardianship over to Onee-san cause she payed their debts.
So he has no money and Onee-san has enough money, connections and the legal rights to find him and take him back or move next to him again anyway.
Hence he cannot escape even if he wished for it.
I dig him getting more bold, but it seems as he does so, she's also getting more...uh...I don't wanna say "unhinged" so much as...honest? Open? Her true self is leaking out.