Yuriko Hayase, a Jougaoka High School student and classmate of Atsushi Arisawa and Kouji Inagaki, defines herself as a dedicated yaoi fangirl. She champions her best friend Inagaki's romantic endeavors while seizing opportunities to photograph male couples in candid moments. Her fervor for matchmaking initially targets Atsushi and Masayoshi Shibata, though her fixation gradually reveals concealed emotional vulnerabilities.

Her dynamic with Inagaki evolves from playful rivalry to reciprocal tenderness. Despite Inagaki’s relentless attempts to woo Atsushi, Yuriko privately nurtures unresolved feelings for him. A critical juncture arises during a Kyoto school trip, where she faces a date rape attempt thwarted by Inagaki’s intervention. The latter confronts the assailant and provides steadfast support, accelerating their transition from confidants to committed partners.

Yuriko’s growth transcends her initial archetype as she sheds exaggerated fangirl tropes. Her focus shifts from fictionalized romance to authentic emotional engagement, culminating in marriage to Inagaki and parenthood of twins. This evolution embodies themes of personal growth and replacing fantasy with tangible bonds.

Her exchanges with peers, particularly Masayoshi and Atsushi, balance comedic levity with narrative-driving influence. While early antics provide humor, her subsequent journey grapples with trauma recovery, resilience, and navigating intricate adolescent relationships.