Takase is almost opposite of his brother - weak and bad at school. He recently moved in at his brother's house, who is a married guy. He is placed under an exceptional coach to improve his physical health, and the coach - also known as 'Venus of Track', is none other than his sister-in-law. She is developing a new technique to improve at a faster rate by managing testosterone levels in the body; in other words sexual desire management. She calls it 'absolute obedience'. And Takase has to go under it to improve himself.
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