Hoteru shimai: Shiri Kansen aibu

As Morimi Shizuka leisurely sips a hot drink at the front door, a masked office worker on his way to work coughs visibly as he passes by. Shizuka, a practicing doctor, lives with her father Shigeru (Iijima), a research doctor working at a university hospital, and her younger sister Mai, but there is no word on the wher…