boss's wife

Setsuna, his wife, warmly entertains his subordinate Kikuchu, who is invited to dinner by his boss Shingo Imamiya. The next morning, Kikuchu was asked by Shingo to do something. It seems that his wife is having an affair, so he asks him to look into it. Kikuchu tails Setsuna, thinking to herself, ``The wife of the boss I admire would do something like that...'' Shingo was right. I saw a man and Setsuna entering the hotel during the day...