With the club recruitment week happening at First High School, Honoka and Shizuku, who are all-round outstanding students, are asked by various clubs to join. When they find themselves mobbed by club members, Eimi comes to the rescue, and the three of them become fast friends. On the way home from school, Honoka and her friends witness Tatsuya, who recently became a member of the Public Morals Committee, being attacked by someone. Eimi decides to investigate who the attacker is, and Honoka and Shizuku get pulled into Eimi’s investigation.