Anyone know the name of this japanese drama show?

Where this girl (slobby) moves to a new place and then her boss moves in with her unexpectedly without knowing she lived there, then the girl has this major crush on her co worker gets with him lives with him but they don't work out and she then moves back to the other house with her boss still in it? I remember watching it long ago, It starts with a K i think. Answer 10 points. Thanks