A senior student and researcher who operates a mysterious device called the Neck Machine. She invites Tomokazu to her lab, pushes him into the machine to test its reality-altering horror effects, and later collaborates with Takashi Gori to improve the experiment.
Sugina and Takashi share a long-standing personal history dating back to their youth.
Tomokazu harbors deep romantic feelings for the popular senior student and seeks a chance to confess.
Explore the full interactive character relationship map of Neck