Yuri Miyazawa plays a married woman suffocating in her daily life with her husband, who turns to a dating app seeking new encounters and excitement. What begins as mere curiosity ignites her suppressed frustrations toward her husband, work-related stress, and a deep-seated longing buried within. The connection she forms with him goes beyond a fleeting affair, penetrating deep into her heart. Her first experience with another man's cock leaves a lasting physical and emotional impact even after returning home. Drawn in by the intense pleasure, Yuri resolves to make it a one-time encounter—but the bond between them continues unfolding in unexpected ways. As fate takes its course, Yuri's life reaches a pivotal turning point.