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 can't 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.
