The main character, Kirishima Saito, had a childhood friend, Yakumo Marina, who had gradually distanced herself from him. Saito and Marina haven’t even had a proper conversation since they grew up to adolescence. One day, someone called Saito to the rooftop to talk about something important, but Marina was present there. As soon as Marina saw him, she ordered him to become her fake boyfriend to avoid men. “Can you please play the role of my boyfriend? You have two choices for the answer: ‘Yes’ or ‘YES’” However, he didn’t yet know that her intentions were something else. This is a story of a guy who thought he was a fake boyfriend, but before he knew it, he became her real boyfriend…