Synopsis

Sagiri Yuko, Tsurugi Miki, Sayo Hitsugi, Ampule Zero, Arashi Mikoto, and Oriha Ampule One arrived at Tobioka Port to investigate a recently docked cargo ship. Two twins appeared, addressing Hitsugi as "senpai," but their intentions seemed far from friendly. What was the true reason behind their desire to provoke a confrontation?