That's my Yuki...she blows a fuse and doesn't kick him out, no SHE leaves - her own room.

I was just about to comment about that but then I saw yours and its betters.

At least we're agreeing ^^ it's another thing altogether if you're living together and storm off in a fit of rage with no firm goal whatsoever apart from "up up and away".
But Yuuki as she's been portrayed so far...there's a big chance she forgot. That it's her home. That she could kick him out if he annoys her so much. This ahead-planning, -working, -thinking universal tool just comes completely undone as soo as she gets emotional ^^