Hatsu*haru Vol. 3 (manga)

They say idiots don't get colds, but Kai sure has been love-sick over Riko. There's a fireworks festival around the corner, but instead of asking Riko along, he decides to just not go! When Class Representative work keeps them late at school anyway, it looks like the perfect chance for Kai to collect his feelings and confess...With summer vacation approaching and fireworks booming overhead, will the feelings Kai's precariously kept under wraps finally explode?