Yukino was asked to act as double of her twin sister, Marino, for a blind date with Hikari, who is the son of the president of a law firm. He is half-Japanese-half-American, and he says he fell in love at first site with Marino. He proposed to Yukino at their first date, and asked her to be his secretary. Yukino hated Hikari's selfish behaviors at first, but she is falling, little by little, for him as he stares at her with his beautiful hazel colored eyes, talk about his dreams, and tells her how much he loves her. However, she realizes she is not Marino. So she decides to run away from Hikari as she feels inferior to her perfect sister...

Koharu lives with her mom's ex-boyfriend, Ryouji, after he adopted her. They are living as a happy family; however, one day, they cross the line that they're not supposed to cross desiring each other's body like beasts. Now their destiny starts to take its own course...