Kazunari Kyougoku heads a rising trading firm during the Taishou era. His unmatched negotiation skills enable him to secure every deal he targets, earning him growing recognition among rivals. Yet this success stems not solely from bargaining—he can hear people's thoughts. This ability has let him see through many lies, leading him to distrust others. Seeking to boost his business's prosperity, Kazunari plans to marry the daughter of the noble Suwabe family. His proposal is accepted, and he soon learns a detail about his future bride. Nana Suwabe cannot speak. Knowing this, Kazunari is pleased that he will only need to hear Nana's inner voice. However, when he meets her, he quickly realizes he cannot hear her thoughts. Having spent his whole life hearing others' intentions, Kazunari strives to gradually understand his partner's true feelings and find a harmonious future together.