Hatsujou Season | 発情し～ずん

A certain day, The girl of the alone has changed her school to the class of the protagonist saito Osebe. She yuri-sha of the face that thinks pa and understands as the foreigner, From features and a calm character beautiful that, Class in less than no time...... It becomes a popular person in the educational institution. And, it changes and the Aya joining to the educational institution life that doesn shine, A certain day when saito was cheerful somehow in shape pulled to surroundings that became noisy by Niwaka...... Saito, It knows a terrible secret of yuri-sha and it will do.