Masato woke up feeling groggy from excessive drinking, disoriented and unsure of where he was. The room was unfamiliar, and lying on the floor beside him was someone half-naked and asleep. When he saw her face, he gasped in shock—it was Kashima Haruka, his junior at work whom he had secretly liked for a long time. She wasn't just another coworker; she was someone truly special to him. Though he had planned to confess his feelings properly someday, the alcohol had overwhelmed him, and he had acted impulsively. Now, consumed by regret, he kept apologizing over and over. Haruka, in response, lowered her eyes with clear irritation. She understood his feelings, but couldn't easily forgive his behavior. What would become of their relationship now? How could Masato win back Haruka's heart? And how would their bond change after this single, fateful night?