Nagi Shiratori is the only daughter of a large company, the Shiratori Group, she is feared because of her family background and is looked away from by her classmates. One day, however, she is suddenly asked by a stranger, a male student, to become “engaged” to him, and Nagi is perplexed. She is rescued by a beautiful young man named Rei Kuroshima, who for some reason claims to be “Nagi's boyfriend” even though they have never met before. In fact, Kuroshima says that he was sent as a guard to protect Nagi from those who are after her fiancé. In order to avoid being targeted by others, the two pretend to be friendly “lovers” at school! On the outside, Kuroshima plays the role of a sweet boyfriend, and on the inside, he teases the confused Nagi.
However, behind the scenes, Kuroshima is hiding his growing feelings for Nagi!

A high tension reversible love comedy where love starts from a lie!