Tooru and Run have always been great friends, so when Tooru finds out she's been accepted into the same high school as Run, she rushes to tell her... only to discover Run in a sexually inappropriate situation with yet another female, Yuko. Needless to say, this causes some friction at school, with Tooru fending off individuals who might be interested in Run, while Yuko and their other girlfriend, Nagi, must deal with Run's own drama.