"You're my secretary. I can use you however I want…" "Why do I have to do this?"-----Hina Nakaya works as a secretary and at a business meeting gets harassed by Masaomi Hifumi, the CEO of the client company. After the meeting, Masaomi suddenly kisses Hina. She headbutts him and escapes from him. One day, Hina's mother introduces her fiance and his son, who's going to be Hina's step brother, whom Hina is very surprised to see again...