Yui is suddenly asked to be the fake fiancée of Kouki Takato, a sergeant in a big company. For some reason, she lives a life of poverty, and her first impression of Kouki, who is flirting with her money, is super-horrible. She immediately rejects the proposal, but when he unexpectedly and sincerely apologises, she is smitten and agrees to accept. When they start living together, Kouki is kind and heals Yui from her many hardships... A heartwarming love story that goes beyond business and starts with a lie.