Three high school students (Shono Hayama, Amane Okayama and Shusaku Kamikawa) all have a crush on Haru (Yurika Nakamura). After school, they follow Haru secretly until she gets home safe. One day, they see Haru go into an apartment with an unknown good looking man, Masahiko (Ryo Narita). The three students all become upset. They sneak into his apartment and take an expensive watch. Because of this, the three students become involved in a case.