name of this japanese drama?

from what I remember the synopsis goes like this: there is a successful beautiful girl who very good at her work and she's very pretty and stuff at her workplace but at home, she just dresses in slacks and sweatpants and is just of dirty and messy. The landlord son comes to inspect the property but he doesn't know someone is living there he is also his new boss at work

Yes, i also think it's Hotaru no Hikari a funny drama and movie.