The wife of a female teacher who is going to inspect the educational trip has been arranged. Due to cost reduction, the only accompanying person is a male teacher. Although there are no issues in their marital relationship, from the perspective of her husband, who holds prejudices against the teaching profession, viewing it as "unproductive and filled with many insidious individuals," the idea of teachers staying overnight together on a business trip was unpleasant. For Miho, who has no interest other than her husband, this should have been needless worry, but her sensible colleague quietly and persistently confronts Miho with his insidious desires...