Every time I lose to my "hated" girlfriend, my true feelings are exposed――. Wakaba Yoshizawa's childhood friend, Komaki Umezono, is perfect. A model student who is virtuous and talented…… that’s just the surface; she is a malicious girl who looks down on others. Desperate to win against someone like Komaki, I placed something important on the line and challenged her to a match―― only to end up losing. And what was taken from me, as "Wakaba kissed me of her own will," was my first kiss. In an attempt to regain my dignity, I challenge her again, but she sets the condition that if she wins, she will take something precious from me――. From dates to sleeping beside each other, even the words "I like you" that I wanted to say to my first love. I should hate Komaki for taking everything away from me. But what is this feeling that flows in to fill the void left behind?