Honeymoon affair trip - last night and first night

Yuichi, who works at a major trading company, and his subordinate Aino, have an affair. The two are strongly attracted to each other and gradually become more involved. However, even after an affair, Yuichi always returns home that same day, and the two never spent the same night... their first hot spring trip... their first night spent together. A man and a woman engage in passionate secret affairs at a hidden inn with a scent of hot spring flowers that has been distant from everyday life.