Seia Sakaki serves as a waitress at Noël, a coffee shop reimagined as a cosplay café. Working alongside fellow married staff members Kanae and Ryouka, her uninhibited and direct demeanor significantly boosts the café's appeal, consistently drawing crowds to maintain full occupancy.

Despite her overtly sexual and unrestrained conduct at work, Seia experiences intimate neglect from her husband. This void fuels her lack of inhibitions and amplifies her responsiveness to external attention. She develops an interest in Tomoya Asahina, the café's young acting manager, viewing him as a potential avenue for personal fulfillment. Recognizing Tomoya's romantic fixation on another waitress, Akiho, Seia collaborates with her colleagues to advance their relationship rather than pursuing Tomoya herself.