Kotoba Nakayama(24), who joined SOD for the third year, is also in a position to guide her juniors. However, the new junior is a clumsy guy. He makes a series of mistakes at work. On top of that, Nakayama makes a huge mistake of booking only one room at the inn where she is staying on a business trip... She ends up sleeping in the same room as her clumsy junior. This is a true story of how the clumsy junior attacks Kotoba Nakayama while she is sleeping due to a mistaken outburst.