Oneechan ga Kita
Genres: Comedy, Slice of Life
Type: TV, Episodes: 12
Aired: Jan 9, 2014 to Mar 27, 2014
Studio: C2C
Source: 4-koma manga
Rating: PG-13 - Teens 13 or older
Synopsis:
The story revolves around Tomoya Mizuhara, a 13-year-old boy who suddenly gains a big sister when his father remarries. 17-year-old Ichika is a little strange, and her affection for Tomoya is rather overwhelming, if not scary. On top of things, Ichika's friend Ruri is the ultimate sadist. Then there is Ichika's big-breasted quarter-Japanese friend Marina.

(Source: ANN)