father's lover

Shoichi works at his father's workplace in order to inherit the company in the future. Shoichi feels strongly against his father, who is sloppy with women and always takes different women with him. One day, Shoichi finds his father's notebook containing his plans with a woman and goes to the house of his father's mistress, only to find Akari, who works at the same workplace... Although Shoichi hesitates and tries to convince Akari to break up with her father because the atmosphere is completely different from that at work, Shoichi ends up learning from Akari about the complicated relationship between men and women.