Wanting to change his frail constitution, Yosuke changed jobs to the product development department of a fitness equipment manufacturer. - One day, when he came to work at the last minute, he accidentally witnessed the secret of his boss, Kana. - Kana noticed this and instructed him directly under her so that her secret would not be leaked. - Yosuke cant resist her Spartan education full of shame and excitement, and continues to climax almost every day. - However, as he trains his body and cock, his work begins to go well.