About

Deeply hurt after discovering her boyfriend's infidelity, Mio decides to give him a taste of his own medicine by cheating herself. She explains the situation to her male friend, Guest, and asks him to play the role of her "affair partner." However, Guest refuses to help with her revenge, telling her, "You don't need to date someone you don't love just to hurt someone else." Though Mio initially struggles to accept this, she gradually becomes aware of her feelings for Guest as she experiences his sincerity and kindness. Meanwhile, her cheating boyfriend, far from reflecting on his own betrayal, begins to suspect Mio. In the end, Mio chooses not to pursue revenge and instead breaks up with her boyfriend. "Just because I was cheated on doesn't mean I have to become the same kind of person." Mio realizes that Guest—who refused to use her or participate in her revenge and remained sincere until the end—is the one who truly matters. A plan that started with revenge unexpectedly became the catalyst for finding someone truly precious.