“That’s my child, isn’t it?” —A relationship that began with a one-night stand gradually turns into sweet, devoted love.

Nanako, a 28-year-old florist, reunites one month later with the man she spent a passionate night with without even knowing his name.

He turns out to be Rei, 33, the heir to the Takamiya Group and an aloof, elite Senior Superintendent of Police.

“That look on your face tells me you haven’t forgotten what you and I did that night.”

How could she ever forget…? That intoxicating night when they desired each other so intensely!

When Nanako discovers that she is pregnant, the two decide to enter into a contract marriage for the sake of their child.

But Rei, who initially seemed cold and distant, turns out to be almost awkwardly sincere—and surprisingly sweet and devoted to her…