The Way They Were... Yachiyo and Sato, Welcome to the Takanashis.
Yamada tells a scary ghost story at the end of work and Mahiru is to scared to go home where she would be by herself. Takanashi invites her over to spend the night at his house, Yamada follows them there, claiming to be too scared even though she was the one who told the story in the first place.
Aired 13/06/2010EP 11 - The Way They Were... Yachiyo and Sato, Welcome to the Takanashis.

2010
Wagnaria!!
Set in a family restaurant in Hokkaido, the northern prefecture of Japan, 16-year-old high school student Souta Takanashi works part-time along with his strange co-workers: Popura Taneshima, a high school girl who's a year older than Souta, yet easily mistaken for an elementary/middle schooler, and Kyoko Shirafuji, the 28-year-old store manager who doesn't bother to do any work at all.
(Source: NIS America)