megami no sprinter

takase is almost the 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.