Emiko's senior who engages in a physical relationship with her driven by lust rather than genuine affection. He tries to avoid her emotionally, moves to Tokyo after graduation, and remains emotionally distant while temporarily cohabiting with her.
Tokiko views Yo as a negative influence and opposes his connection with Emiko.
Emiko harbors deep romantic feelings for Yo since high school, despite his emotional distance.
Explore the full interactive character relationship map of Undulant Fever