One day, 29-year-old manga artist assistant, Mio Imai, attended a junior high school reunion and reunited with her friends and her first love, Shuichi Amemiya after 14 years. They decided to dig out the time capsules and found a message left by a classmate who transferred out a year before the time capsules were buried. After that day, mysterious incidents occurred when each of the friends suddenly died one after another. As it continues, everybody starts to reveal the "true side" of themselves with unstoppable loves and hates.