Syuji Asanaga and his childhood friend Yotsuko Utakane, while tracking down Syuji's missing grandfather, unexpectedly end up traveling through time to the 17th century! Upon arrival, they are greeted by a small, flat-chested girl who would one day be known as Sir Isaac Newton!

Syuji Asanaga and his childhood friend Yotsuko Utakane, while tracking down Syuji's missing grandfather, unexpectedly end up traveling through time to the 17th century! Upon arrival, they are greeted by a small, flat-chested girl who would one day be known as Sir Isaac Newton!