We meet Yoh a stay at home, self confessed slave to the handsome Mizuki. Yoh is trying to become accepted as a manga writer so has very little of his own income and is dependent on Mizuki's wage. This was the deal offered to Yoh in exchange for all the domestic duties, sexual benefits and submission to Mizuki's requests.
The dominant Mizuki does not impose too many rules and as the drama unfolds depicting their daily interactions it becomes apparent that Yoh is very enamored with Mizuki and quite thrilled to be with him, although he hides this by acting gentle and submissive.
Mizuki also enjoys the power play and shows very little daily affection remaining aloof and somewhat inaccessible to Yoh.

Cracks appear in their love game when Yoh is fired from his current publisher and his feelings of unworthiness send him onto depression. Mizuki breaks his usual role and becomes the carer causing confusion for Yoh and misunderstanding. Yoh's reaction in wanting to prove himself and his worth creates confusion for Mizuki and brings out his insecurities and fear of losing Yoh.

Both have the type of personality where very little is spoken and they rely on actions, They seem incapable of opening up a dialogue to discuss or analyse their feelings. This is the drama aspect of this story and it has some sadly comedic elements; Yoh hiding behind a sheer curtain, buying additional sets of sheets to encourage more sexual activity and getting drunk and clingy. Mizuki panicking and then confessing in the rain, reacting dramatically when he thinks Yoh is being hugged by another man, binding Yoh's wrists in an attempt to discipline him.

Kudos to the director for this interpretation of a manga. Both actors do a terrific job and are convincing in their depiction of intense sexual chemistry.