Here's a summary of the plot: Akira Kogami's fiancé is suddenly taken away from her by her cunning sister. Feeling devastated and betrayed, Akira turns to wealthy businessman Ryota Amemori who proposes marriage on the spot. As they exchange vows in an impromptu ceremony, Akira finds herself showered with love and pampering as Ryota showers her with luxurious gifts and attention, making her question whether this new arrangement could be the start of something more.