Dark Matter emerges as the primary antagonist Yuuto Matsubara and Ai fought in past battles with their Time Driver robot. These conflicts unfolded during their simpler pre-adult years. The entity manifests unresolved emotional conflicts rooted in Yuuto's adult disillusionment. Now a 27-year-old toy company employee, Yuuto endures persistent emptiness from abandoning his dreams and childhood romance with Ai. Dark Matter resurges alongside the appearance of Yuuto's 12-year-old self and the Time Driver, forcing him to confront suppressed issues. This force embodies consequences of neglected aspirations and relationships, directly threatening the protagonists' futures if ignored. The battle against Dark Matter functions as a narrative catalyst for Yuuto's engagement with his emotional stagnation and unrealized potential.