Rio Ueda

Rio Ueda is the school's most talked-about upperclassman, whose shared Tokyo roots with Sho Naruse sparked a brief but turbulent romance. Behind her polished exterior lies a fiercely possessive and jealous nature — one that drove her to relentlessly bully and isolate Naho whenever she sensed a threat. Unable to tolerate her toxic behavior toward his friends, Sho ultimately ended the relationship. As the story's primary antagonist, Rio serves as a crucial obstacle that tests the bond between the leads and accelerates their emotional journey.