Hinano Yuna, a new employee entrusted with an important project, goes on a business trip to Tohoku with the veteran employee, Sagawa. However, they end up in a tight spot due to a failed client meeting and a hotel booking mistake, which Sagawa uses as an excuse to pressure Hinano. Although she strongly resists at first, Hinanos emotional and physical boundaries gradually begin to blur under Sagawas relentless advances. After a one-night incident, she transforms, moving beyond shame and confusion to actively craving him.