A school bully who is secretly Rio's lover. She helps lure Tomoko into Rio's clique. After suffering a mental breakdown and revealing a traumatic past of abuse and murder, she attempts to harm Tomoko before jumping to her death from the school rooftop.
A hidden romantic partnership that drives early plot dynamics and later tragedy.
It is revealed that Rio and Naoko are secretly lovers, with Naoko assisting Rio in luring Tomoko into their clique.
An antagonistic relationship rooted in jealousy and Naoko's mental breakdown.
Naoko attempts to stab Tomoko in class, accusing her of taking Rio away from her.
Explore the full interactive character relationship map of My Rainy Days