Unbeknownst to Akira and Yoko, Yamaoka, a prominent figure in the organization, ignores their boss's warning and hatches an insidious plot aimed at the Maguro group . In order to assassinate either the gang's chairman or captain, Jiro, a poison expert, is brought in. So begins a murder mystery that will change everything. Meanwhile, Akira, who's just been commissioned to do Valentine's Day illustrations, begins to notice something strange is going on in town.