Kiniro Mosaic

The story begins with Oomiya Shinobu, a 15-year-old, seemingly pure Japanese girl who actually did a homestay in Great Britain. Even after coming back to Japan, she still misses her time overseas. One day, an airmail letter arrives from Alice, the girl in Shinobu's host family in Great Britain. The letter reads: Shinobu, I'm coming to Japan! The Japanese/British girls' mixed comedy follows the lives of Shinobu, Alice, and other girls from both Japan and Great Britain.
(Source: Anime News Network)