Let me purify your room
Miko Yakumo is constantly moving from one dubious apartment to another. Her line of work involves purifying abodes where unnatural death has occurred, "laundering" them and making them livable for the next tenants.
At every residence, she encounters the original tenant turned ghost who hasn't been able to cross over into the spirit world. And since she is able to see them, she ends up having to listen to all their troubles and woes.
When she reconnects with her insufferable former neighbour, love blossoms between them.