Nemurenu Yoru no Monogatari

After loving Shouhei ever since her second year of middle school, Natsumi finally gets to go out with him. But then she starts getting calls telling her to break up with him. Then mysterious things start happening around her. Pots falling from windows, insects in her locker, glass shards in her towel. Are these just harmless pranks, or is someone truely out to get Natsumi?