Watanabe Hanna is a carefree girl and a slowcoach. All of the men she'd dated till now had told her off and then dumped her because of her leisureliness. This made Hanna totally lose her self-confidence. On lonely nights, she finds pleasure in casual sex with random people. After being transferred to the Third Sales Department from the General Affairs Department of Yamabato Confectionery company, can her new co-worker Ogata Kaito restore her self-confidence?