烟花

小学生典道（山崎裕太）与佑价（反田孝幸）等同伴们就烟花升腾而起时是扁是圆展开争论，无果后，众人困惑起来，为了将困惑解决，他们决定趁夏季花火大会的机会去燃放烟花的灯塔上一探究竟。 　　典道和佑价同时暗恋的同学，早熟的少女奈砂（奥菜惠）因为父母离异怀起心事。一场在典道和佑价之间进行的五十米游泳比赛结束后，奈砂单约胜利者佑价陪她去看烟花，不想对方最终决定同大伙一起去灯塔。奈砂最终拉上比赛失败的典道上路，目的地却变成了火车站甚至更远的东京。On the day when a fireworks display is planned, Norimichi, Yusuke, and their friends at school in a Japanese seaside town cannot agree whether or not fireworks are "flat" or "round" when they explode in the sky. With her parents divorcing, the young teenager Nazuna has more serious matters on her mind. Although unknown to the others, Nazuna's mother intends to take her away after the summer break. When Norimichi and Yusuke race 50 meters in the swimming pool, Nazuna secretly decides that the winner will accompany her when she runs away from home. Meanwhile the gang from school decides that the best way to figure out the shape of fireworks is to view them from the side, and they set out for a lighthouse above the beach from which the fireworks display will be fired.