A-Channel
Tooru and Run are close friends forever, so when Tooru discovers that she has was able to get into the exact high school as Run, she runs to tell her... just to locate Run in a compromising position with another girl, Yuko. Need less to say, making things somewhat awkward in the faculty, with Tooru fending off while their girl friend, Nagi and Yuko, need to deal using Run's very own penchant for play, those that might be thinking about Run.
(Source: Sentai Filmworks)