Former girlfriend Sakura has married my best friend, standing beside him with a seemingly happy smile. But that happiness is merely a mask. Suffering from domestic violence and emotional abuse, she breaks down in tears in front of me. As I comfort her, uncontrollable emotions begin to stir within me. The thought of an affair arises—but if I didn't support her, she might have completely broken. Soon, the two of us, forgetting everything else, start building a new relationship, blending pure love with infidelity.