Looking at the picture, one would think it's the father-in-law of the bride, right? But in reality, the content is completely different from what you initially thought. Nao Jinguji is a graduate student who has a stable job thanks to the wise advice of her former teacher, so she attended a good school and studied a field that offers job stability upon graduation. To show her gratitude, when she learned that her teacher's wife was ill, she went to help take care of him, but little did she know that he was a pervert who took advantage of her gratitude and forced her to be his mistress, secretly filming her and blackmailing her day after day.