1. Say Goodbye to the Past

Katagiri Teppei, an advertisement designer who is transferred to the Sales Department and is forced to adapt to the new working environment. He checks in to a hotel with Uesugi Riko a night before but forgets about their encounter even when he sees her again in the office. They get off on the wrong foot and things always get heated between them. But an unexpected turn of events helps them both say goodbye to their pasts and move forward.