Tsumugi, a diligent office worker with passion for her work, has a secret she can't tell anyone. She has a voice fetish so intense that her underwear gets sopping wet just by hearing the voice of Mr. Hatsune, a coworker she's close with. Fearing it will make him uncomfortable if he were ever to find out, her heart races every time he comes to talk to her. But, one night, he made a move on her, saying, “You love my voice, don't you?" and stole a kiss from her lips. He also whispered into her ear, asking, “Don't you want to hear me say sexy phrases in this voice?"…!? “What do I do? I can't resist this sort of thing… He's gonna find out that I'm soaking wet…"