说明：  3D烟火大会前夕，中学吵吵闹闹的登校日。典道和祐介在校内游泳池偶遇两人的暗恋对象——班里偶像般的荠。
(On the eve of the 3d fireworks conference, high school noisy boarding day. Canon way and you interface in the school swimming pool encounter two people like object - the idol of shepherd's purse in the class.)