Yotsuba, an office lady, goes on her first business trip with her boss. When the two head to their lodging after work, they find that only one room is reserved at the inn. This was deliberately arranged so that Yotsuba could stay in the same room as her boss... She is swept away and addicted to the temptation of her subordinate who acts pure and innocent... A one-night forbidden love that transcends the age difference and hierarchical relationship.