O Kuchi Ga Etchina Jakuten Datte, Raibaru No Eriito Douryou Ni Barete Shimaimashita summary:

Suzuka Takamine has worked at a major business consulting company for three years. At the office, she’s called the unattainable ’Takane no Hana’, because of her work performance and good looks.But she has a complex. Her mouth is overly sensitive.When her mouth is stimulated, her body reacts with a jolt and her eyes overflow with tears.One day, the secret she’s been hiding from everyone is discovered by her colleague; the company’s ace, Kouma Zaizen.To get caught by her rival, of all people, could have been the end of her, but Takamine’s reaction seems to match Zaizen’s fetish to a T.”What a sexy expression… So cute. I want to make you cry more.”He’s a little sadistic and totally infatuated with her, complex and all.