[i]"Whenever I open my mouth, something stupid comes out."

Yoriko is a sultry office lady who has caught the attention of her younger co-worker Shiotani-kun, but Yoriko has a severe case of foot-in-mouth syndrome, and manages to blurt out the worst possible utterances whenever he makes an attempt to get close to her, contrary to their mutual desires.

Will their mutual feelings bloom beyond of her guilt of unwittingly driving him away, and his own guilt from being driven to the wrong conclusions?

Will she stop being a flustered dummy and say what she wants to say for once?