Green Green 3: Hello, Goodbye

It has been a year since the Kanenone Gakuen transitioned into a co-ed school, integrating female students into a previously all-male high school. The school closure riots that followed were temporarily settled and the summer vacation was coming to an end by August. Yuusuke and Futaba are still fighting as usual, but they managed to keep it afloat. Everything seemed normal again, until suddenly......