SYNOPSIS

“I want you to be the one to teach me about sex， Mifune.” The hardworking office worker Hiyo has secrets she can’t tell anyone. One， that she’s the daughter of the president of Tachibana Holdings， and two... that she’s a virgin. One day， when she is working together with her overly strict mentor， Mifune， on a new project， her status as a woman from a good family is found out...! Yet Mifune kindly listens to everything she has to say... and she realizes she wants him to teach her about sex.... She decides to directly ask him to do so! When she does... he responds that she is to ask no one else to do the same and goes on to use his sweet and gentle fingers to teach her for the first time what pleasure can be... That is how the sexual relationship of the expressionless， cool-headed senior and his pure junior begins.