On the night of Yui Saikawa’s big stadium show, Kimizuka and Natsunagi struggle to protect her from a hidden assailant. But the further the two dig into the plot against Saikawa, the clearer it becomes that the teen idol has secrets of her own.
♬ The rhythm pounding in my chest ♬
Mein Herz schlägt im Rhythmus.
 El ritmo latiendo en mi pecho 
Le rythme retentit dans ma poitrine
O ritmo pulsando em meu peito